'PAR' in PAR 20 or PAR 50 is an acronym standing for 'ParabolicAluminized Reflector'. This name refers to the construction of thePAR bulb. The bulb traditionally features a tungsten filamentsurrounded by a reflector with an aluminum coating (hencealuminized). The reflector intensifies the beam and makes it moreefficient. 'Parabolic' has to do with the flat ovular shaped poolof light the bulb gives off.
A normal light bulb can take up to 20-30 kilowatts so it all depends on what type of light bulb. My light bulb can take 15 kilowatts max and will blow out in an hour straight. 1 product rating - Par 20 3 Pack FL25 35PAR20/FL 35 Watt Halogen Spot Light Bulb Replacement 120V 1 $13.40 Trending at $14.53 Trending price is based on prices over last 90 days.
How big is a par 20 bulb?
The PAR stands for Parabolic Aluminized Reflector. The number 20 indicates the number of 1/8 inch increments of size. Therefore the diameter of the large end of the bulb is 2-1/2 inches. Read More
What is the alt code for light bulb?
you can make a light bulb by holding alt + 20. Read More
Does Edison's light bulb still burn in Smithsonian?
the first light bulb was created over 200 years ago but sadly the light bulb stopped working when a stanger took the light bulb from the museum 20 years ago. Read More
How much electricity will light up a light bulb?
The amount of power needed to light up a bulb is measured in watts and is marked on the bulb, along with the correct operating voltage. For example 240 v 20 watts. Read More
Which type of bulb is more efficient incandescent or fluorescent?
A typical 20-watt compact fluorescent light bulb can produce about as much light as a 100-watt incandescent light bulb. There is an 80 per cent improvement in efficiency. Read More
How many Jimmers does it take to fix a light bulb?
How much electricity does a low energy light bulb use?
The power in watts should be marked on the bulb. If a bulb is 20 watts, it will use 20 kilowatt hours in 1000 hours of being switched on. Read More
What is the difference between a LED light bulb and a regular?
a regular light bulb emits about 80% heat energy and only 20% light energy, whereas leds emit about 70 % light and 30% heat Read More
How efficient is a light bulb?
An incandescent bulb is 96% efficient as a heater, and 4% efficient as a source of light. A fluorescent bulb is only 60% efficient as a heater, and 40% efficient as a source of light. An LED bulb is only 10-20% efficient as a heater, and 80-90% efficient as a source of light (but that light is usually unidirectionally directed... harder to do diffuse lighting with them). Read More
What type of light is a 20 watt energy saving bulb Halogen Incandescent neon or fluorescent?
A 20 watt incandesent bulb is dim. For a medium sized room you need 100 watts. A 20 watt halogen bulb is brighter but still quite dim. These are marketed as low-energy but they are not. For a medium sized room you need 80 watts. A 20 watt fluorescent bulb can light a medium sized room quite brightly. This is a genuine low energy bulb. Read More
What is the weight of a four foot fluorescent light bulb?
The average fluorescent light bulb weighs about 3 to 5 ounces. That would make the weight of four of them to be about 12 to 20 ounces. Read More
What does a sodium vapor light bulb cost?
How much did thomas edison's light bulb cost?
24 volt cordless drill battery can you run a 20 volt bulb from it?
The bulb will light but it will be brighter that the wattage rating of the bulb. The higher voltage will shorten the life of the bulb by a very appreciable amount. It is not recommended to do. Read More
How many people fall at night without a light bulb?
Why does a 100W light bulb cost more than a 1200-W hair dryer does?
A 100 watt light bulb does not cost more that a 1200 watt hair dryer. The average price of a light bulb is about 90 cents whereas a hair dryer can range up to 20 dollars. Read More
Which consumes more electricity a halogen bulb or an incandescent bulb?
How much electricity is consumed depends only on the power Wattage of the light bulb. No matter what types of bulbs they are, a 100 Watt bulb will always consume more electricity than a 60 Watt bulb. The type of bulb makes no difference to how much electricity is consumed but does make a big difference to the amount of light that is produced. In general: * a 100 Watt halogen bulb will produce more… Read More
How much electricity would it take to make a light build explode?
A normal light bulb can take up to 20-30 kilowatts so it all depends on what type of light bulb. My light bulb can take 15 kilowatts max and will blow out in an hour straight. So if your using some different type of light bulb like an Eco friendly one, look at the package to see for details or talk to your local electrician. Read More
How many watts was Edison's first light bulb?
Thomas Edison's first lightbulb was about 20 watts Read More
How many people are needed to change a light bulb?
20 Chinese acrobats, or one man with a ladder. Read More
How do you replace the light bulb for the gear shift indicator in a 20 06 Toyota matrix?
http://matrixowners.com/index.php?/topic/85443-how-to-get-to-light-behind-the-shifter/ Read More
Why does energy saver give more light than electric bulb of same watt?
Both bulbs output the same amount of energy. The difference is in how much of that energy is output as heat vs the energy output as light. In a standard incandescent light bulb about 10% of the energy is output as light while the other 90% is output as heat. This makes the bulb only 10% efficient. For a florescent bulb the output of light is about 50% and the other 50% is output in… Read More
Will my marijuana plant still grow indoors if im only using one 60 watt light bulb in my closet?
the answer is no you can not grow weed with a 60 watt light Really my ones grew with a 40 watt mercury light and a 20 watt argon bulb Read More
What kind of LED bulb - with a decent amount of light - produces the least heat?
The amount of light produced is measured in lumens, while the electric power used is measured in watts. An old-type 100 watt incandescent bulb produces about 1200 lumens. The same amount of light can be produced by a 70-watt halogen bulb, a 20 watt CFL bulb or a 15 watt LED. The power that is not turned into light is turned into heat instead. Read More
INFO ABOUT 60 watt light bulb?
a normal incandescent 60 watt light bulb uses 60 watts of electricity to produce 20 watts worth of light, and 40 watts worth of heat. It is more of a heat bulb than a light bulb. it is great if you can capitalise on the free heat, but if it is not cold in your house, turn it off. is there a better bulb? no. why are they ideal? cheap (as low as 10 cents… Read More
Can you use a 71 watt bulb in a 60 watt fixture?
Light fittings should not be overloaded electrically because overheating can cause a fire. Alternatively you could use a 20 watt low-energy bulb. Read More
What does the power rating of a light bulb measure?
The power rating of light bulbs tells how much electric energy in watts the bulb consumes when burning. As an aside, a rule of thumb for estimating how much you are paying to burn a light bulb for a year, the number of watts equals the number of dollars. So if you burn a 40 watt bulb for a year it costs about $40. If only at night cut that in half and say it… Read More
What's an integer that is 7 under par?
There are a few numbers that are integer that is 7 under par. Some of the numbers are -5 and 20. Read More
What is the wet-bulb depression if the dry bulb is 20 and the wet bulb is 17?
How much energy to produce one light?
Lights vary tremendously in power, but the normal incandescent bulb takes 100 watts. Low energy bulbs can give the same light at 20 watts Read More
How to change the front parking light bulb on a 89 Chevy Corsica?
There is a screw on the rear of the lens. It is either a t-15 or a t-20 torx bit. once you take the screw out, pull out the light assembly and twist the socket counter-clockwise. Then pull out the bulb. Reverse for re-installation Read More
If you shoot 20 rounds under par what is your handicap?
It depends how many shots under par you shot and the difficulty of the course. But it would be + something. Read More
What does 40 watts bulb mean?
An electrical watt is a measure of power. A 40 watt light bulb uses 40 watts of electrical power. It has a relative measure of twice the light output of a 20 watt bulb and one half the output of an 80 watt bulb. A 40 watt bulb uses 40 Joules of energy each second, or 40 watt-hours of energy each hour. In 1000 hours it uses 40 kilowatt-hours or Units of electrical energy. Read More
What kind of battery can power a 40 watt light bulb?
If the bulb is a 40 watt, 120v bulb, you would need 20 6 volt batteries wired in series, or 80 (!) 1.5 volt batteries. 1.5 volt batteries are AAA, AA, C, D, etc. Since this solution is rather extravagant, try finding a light bulb made for an RV. These typically run off of 12 volts, and you can get a single 12 volt battery, or 2 6 volt batteries, to run this bulb. Read More
Why does light heat up a room?
it depends what type of bulb it is for example if it is an energy efficient bulb it uses about 80% of the electrical current into light and 20% heat but if it is a filiment bulb it uses only 30% of the electricity into light the other 70% is turned into heat so they are better heaters than light sources filliment bulbs can be found in old reading lamps on electric radiators filliment bulbs… Read More
How much energy does a 150 watt light bulb use each minute?
The definition of a Watt is 1 Joule/second. Therefore: 150W * 60 Sec = 9000 Joules / minute. In units more applicable home energy use, 9000 Joules/minute equals .0025 Kilowatt Hours (KWh)/minute. On a cost basis, if for example, electricity from a power company costs $.20 per KWh, the 150W light bulb costs 3 cents per hour to use. Read More
How much electricity does it take to light a light bulb?
The power usage of light-bulbs is typically between about 20-100 watts, depending on the technology used, and the brightness. The power usage of light-bulbs is typically between about 20-100 watts, depending on the technology used, and the brightness. The power usage of light-bulbs is typically between about 20-100 watts, depending on the technology used, and the brightness. The power usage of light-bulbs is typically between about 20-100 watts, depending on the technology used, and the… Read More
How do you replace a head light on a 1985 Ford truck?
Do you mean the head light or the buld? The bulb is easy, twist the plug located on the back of the head light assembly and remove the bulb, insert the new buib and put it back together the way you took it out. The whole head light assenbly requires removeing the grill, the blinker assembly and unbolting the head light assembly from the body panel. Suggestion, BUY THE BOOK 20 bucks and the auto… Read More
How do You change a brake light on a 1994 Chevy van?
special bit for light lens cover, t 10 or t 20 bit light bulb unscrew from socket replace observe ligh light place foot on brake , re screw use brick on brake pedel Read More
What is a small unit of energy called?
The SI unit, called the joule, is a fairly small unit (a typical fluorescent light bulb uses 20-40 joules every second). If you need even smaller units, you can use the millijoule, the microjoule, etc. The SI unit, called the joule, is a fairly small unit (a typical fluorescent light bulb uses 20-40 joules every second). If you need even smaller units, you can use the millijoule, the microjoule, etc. The SI unit, called the… Read More
How many lights can a 20 amp breaker handle?
20 amps * 120Volts = 2400 watts 2400Watts *80% = 1920 watts allowed on circuit. 1920watts / 65 watt light bulb = 29 bulbs Read More
How much money do you save per year when you swith from 60 watt light bulb to 40 watt?
It depends on how much you use the light, and how much power costs in your area. You can find out the second by looking at your electric bill... it'll give the cost per kWh (kilowatt-hour). The difference between a 40 watt bulb and a 60 watt bulb is 20 watts, meaning you'd have to leave the light on for about two days straight for the savings to be even one kilowatt-hour, and if it… Read More
If the battery has a voltage of 9 v and the light bulbs have resistance of 10 ohms 20 ohms and 30 ohms What is the voltage across light bulb 2?
See my prior answer on this ckt. Briefly Itotal =9/60=.15=150ma Vr2=IR=.15*20=3volts Read More
Can you use a 100 W equivalent rated LED in a lamp where 60 Watts in the maximum?
Yes, that should not be a problem. The wattage maximum on the light fixture refers to the actual power used by the bulb, which is probably about 20 watts for a '100 W equivalent' LED bulb. The packaging for the LED bulb should state the actual power used. Read More
How much money do you save by replacing a single incandescent light bulb with a compact fluorescent light?
OVer time you will eventually save money off of your electric bill because the CFL uses less energy. So you can save a lot of money Depends on the wattage of the incandescent compared with the wattage of the CF that replaces it. In the UK, replacing a 100 watt bulb with a 20 watt bulb might save 10 pence in 12 hours running. Read More
Can you grow marijuana with energy saver light bulb?
I dont know just use a florecent bulb no u cant. ur crop will be about a 8th unless u grow it for somthing stupid like 20 weeks nd hardly any leafs grow. Read More
What is the definition of veinte?
What is the definition of venti?
Can you use a 75 watt bulb if it says 60 watts?
Usually the 60-watt limit is used to prevent the lampshade overheating, so a 75-watt bulb should not be used. But if more brightness is required, try a low-energy bulb because a 15-watt one gives the same light as a 75-watt incandescent (old-style) bulb. Or a 20-watt would be even brighter. Read More
How do you replace light bulb in jenn-air microwave?
you take it out,then put another one in!!!dah!!! 1. Disconnect power to oven. 2. Remove the 2 screws located in front on top of microwave securing grille. 3. Remove grille (slide to right then out). 4. Remove the screw securing metal light cover. 5. Remove the filter and metal light cover. 6. Remove screws securing bulb holder (if needed). 7. Remove light bulb Install new light bulb (20 watt halogen do not touch with skin)… Read More
(Redirected from Parabolic aluminized reflector light)
A Parabolic Aluminized Reflector luminaire
20 PAR cans
A parabolic aluminized reflector lamp (PAR lamp or simply PAR) is a type of electric lamp that is widely used in commercial, residential, and transportation illumination. It produces a highly directional beam. Usage includes theatrical Lighting, locomotive headlamps, aircraft landing lights, and residential and commercial recessed lights ('cans' in the United States).
Many PAR lamps are of the sealed beam variety, with a parabolicreflector, one or more filaments, and a glass lens sealed permanently together as a unit. Originally introduced for road vehicle headlamp service, sealed beams have since been applied elsewhere. Halogen sealed beam lamps incorporate a halogen lamp within a quartz or hard glass envelope. sealed beam lamps come in a variety of standarized sizes and nominal voltage ratings.
- 3Uses
- 4Types
- 5Variations
Construction[edit]
Sealed beam headlamp. When the lamp burns out or breaks, the whole assembly must be replaced
A PAR lamp consists of a light source, with lens and a parabolic reflector with a smooth aluminium surface determining the spread of the beam. The most common sealed beam type combines these three elements into an integral unit. The light source usually approximates a point source that can be focused on; tungsten filaments and halogen lamps are common, but some theatrical usage that requires a higher color temperature may use hydrargyrum medium-arc iodide (HMI) instead.
With larger sizes such as the PAR64 and PAR56 found in stage lighting, it is more economical to use a separate setup that allows swapping out parts independently. In such a setup the reflector is known as a Raylite reflector, and is usually combined with bi-pinquartz halogen lamps such as the 500 watt A1/244. Lens are optional in these setups; an aperture[a] is usually used instead to make the beam more visible when used with smoke or fog effect.
Effects[edit]
The sealed beam lamp produces an intense oval pool of light with unfocused edges. The only focus adjustment is a knob that allows the lamp/lens unit to be rotated within its casing, thus changing the orientation of the oval. With some models this control is via the mogul ceramic connector which connects directly to the Mogul prongs of the lamp. With the SourceFour PAR, the interchangeable lens is what is rotated. Therefore, the diameter of the light spot is defined by the aluminium reflector, and cannot be adjusted without changing the lamp. The type of lamp includes extra-wide flood (XWFL), wide flood (WFL), medium flood (MFL), narrow spot (NSP), and very narrow spot (VNSP). [1]
These types of instruments come in varying diameters, the most common being designated PAR56 and PAR64. The number indicates the diameter of the housing in eighths of an inch (so a PAR64 is eight inches (~20 cm) in diameter).
Uses[edit]
Automotive headlamps[edit]
Two Mercedes-Benz SL: right with US-spec sealed beam type headlamps; left with normal headlamps for other markets
Sealed beam headlamps were introduced in the United States in 1939, and became mandatory from the following year until the 1984 model year. Cars prior and after that date could have a variety of shapes of headlamps, using any of a wide variety of replaceable bulbs. Between 1940 and 1956, all U.S. cars had to have two 7-inch round headlights. Each headlight had dual filaments so that one bulb provided both high and low beam. In 1957, regulations changed to allow four sealed beam headlights (two on each side, each measuring 5 ¾ in.). Two served as low and high beam like the 7” version, while the remaining two were additional “high beam” only lamps. This influenced the overall design of the American-made vehicles. From the 1975 model year, a new system of four-lamp rectangular sealed beams began to be used on U.S. marketed automobiles, joined three years later by a two-headlamp system. Halogen sealed beam headlamps appeared on U.S. cars in 1978 to enable halogen technology under Federal Motor Vehicle Safety Standard 108, which at the time required all headlamps to be of sealed beam construction; eventually, halogen sealed beams came to dominate the sealed beam lamp market.
The limited range of standardized sealed beam headlamp sizes and shapes restricted styling options for automobiles. Replaceable-bulb headlamps provide the regulated light distributions while allowing greater design and engineering freedom.[2]
Aircraft[edit]
Aircraft landing (ACL) lights are often sealed beams that have a very narrow beam spread. They typically have a size of PAR36 or PAR46, and run on 28 V DC.[3] They have found some use in stage lighting as well.
Outdoor and stage lighting[edit]
PAR lamps and their fixtures are widely used in theatre, concerts and motion pictureproduction when a substantial amount of flat lighting is required for a scene. They are often mounted in can-shaped fixtures known as PARCANs, which can be used to generate colours by fitting them with colored sheets called gels. The cans are arranged into rows of different colours and identical rows placed on different sides of the stage; such assemblies made from aluminum bars are known as PARbars.[b] Due to their affordability, they are ideal for colour washes in several different colours. However, because of the lack of dynamic control over the beam diameter, shape and sharpness, PARs are rarely used as front of house lights other than for front washes but can be used for special effect lighting such as lighting from directly above or from extreme angles as well as general wash lights overhead/above stage. If used cleverly, par cans can provide low budget productions with good effects.
PAR64 sealed beam lamps are often used for these purposes; they are typically available with 250, 500 or 1000 watt power ratings. Beam spreads are designated as FL (flood), SP (spot), NSP (narrow spot), and VNSP (very narrow spot), as stamped on the back of the lamp's reflector.
In situations where sunlight or other specular light is available, a white foam reflector is often used to accomplish the same effect as a PAR array. PAR cans are being replaced in some stage applications by LED stage lighting, which use less electric power and produce a wide array of saturated colors without the use of color filters, when white light is not needed.
Indoor lighting[edit]
Smaller sealed beam PAR lamps (≤ PAR 38) with an Edison screw base is common in indoor lighting. They can be found in recessed fixtures mounted on the ceiling or on tracks.
Lighthouses[edit]
Sealed beam lamp arrays are also in use by modern lighthouses.[4]
Types[edit]
Diameter[edit]
The glass envelope or 'bulb' of all incandescent lamps is measured in eighths of an inch. Thus a PAR 64 is, nominally, 64 eighths of an inch in diameter. The approximate nominal lamp bell diameter in inches can be found by dividing the PAR size by 8. For example, a PAR30 lamp is approximately 3.75 inches in diameter. Similarly, the diameter in millimeters can be found by multiplying the PAR designation by 3.125. For example, a PAR16 lamp is approximately 50.0 mm in diameter.
Designation | Nominal Dia. (inch) | Nominal Dia. (mm) |
---|---|---|
PAR64 | 8 | 200 |
PAR56 | 7 | 175 |
PAR46 | 5.75 | 145 |
PAR38 | 4.75 | 120 |
PAR36 | 4.5 | 115 |
PAR30 | 3.75 | 95 |
PAR20 | 2.5 | 65 |
PAR16 | 2 | 50 |
Note: PAR16 cans are also known as 'birdies' in theatre, as it is 'below par', an oblique reference to a term used in the game of golf[citation needed].
Beam width[edit]
Depending on the parabolic reflector geometry and placement of the filament within the paraboloid, PAR lamps can achieve a wide range of beam widths, from narrow spot to wide flood. For lighting effects even wider than wide flood can provide, supplemental reflectors or lenses can be used. The following suffixes are commonly used with PAR lamps to indicate their beam width:[5]
Description | Suffix | Beam angle |
---|---|---|
Very Narrow Spot (VNSP) | CP60 | 12° |
Narrow Spot (NSP) | CP61 | 14° |
Medium Flood (MFL) | CP62 | 24° |
Wide Flood (WFL) | CP95 | 70° |
The suffixes given are for 1000-Watt PAR64 lamps only. The focused beam can be oval and is sometimes specified in two numbers.[5]
Narrow, medium and wide Raylite reflectors are quite readily available.
Standard power ratings[edit]
Designation | Power (W) |
---|---|
PAR64 | 1000, 500, 250 (ACL) |
PAR56 | 500, 300, 200 |
PAR46 | 200, 150 |
PAR38 | 150, 120, 100, 75 |
PAR36 | 100, 75, 30 |
Each lamp type is available in 220-240 V and 100-120 V variants, depending on the common mains voltage for the locale. In Europe, where the mains voltage is between 220 and 240 V, it is common to use series pairs of 110 V lamps because the thicker filament is much less liable to vibration-induced fracture; an important consideration for touring rigs and music venues.
ACL (Aircraft Landing) PARs, which nominally run on 28 V, can be adapted to mains power on stage by arranging them into a series of four or eight lamps, usually consisting of one or two four-bars.
The PAR 36 is also available as 12 V/30 W Pinspot type effect light to illuminate mirror balls.
Electrical connector[edit]
High-power, mains-voltage, theatrical PARs usually use the bi-pin GX16d 'Mogul' lamp connector;[6] G9.5 and variants are common too. Therater metal-halide lamps use G12. In addition to being used on light bulbs themselves, the G38 connectors are also found as a part of the Raylite reflector assembly, although some Raylite reflectors have 'tails' which then require connection to the mains flex with the use of a ceramic connector block (ideally fixed to the can's body).[7]
In residential and office use, the usual connector for the lamp's voltage is often used. This includes Edison screw or a bayonet connector for mains-supplied PARs, or small bi-pin connectors for low voltage applications.
Variations[edit]
LED[edit]
A PAR16 lamp with E27 screw for indoor retrofitting.
A LED stage lighting device designed to replace PAR cans.
LED retrofit equipment that match PAR lamp dimensions is made by some manufacturers. As with the case of LED MR lamps, LED PAR lamps generally use an array of individual LED elements that are unsuitable for reflector operation. Nevertheless, some degree of beam control can be obtained with aperture or lens, and LED PAR 38 replacements with a 40° spread is common.
Models built for stage lighting may use less similar dimensions. They often use a RGB color model for color-tuning abilities, though some higher-end fixtures use a 5-primary colour system instead.[8]
PAR moving lights[edit]
Intelligent, moving PARs allow for the ability to pan and tilt the instruments through a lighting control console. These have been generally superseded by dedicated intelligent lighting fixtures, which use a different light source and offer more control over the colour and shape of the beam.
Combination instruments[edit]
- The Source Four PARnel combines the attributes of the PAR can and the Fresnel.
See also[edit]
Notes[edit]
- ^'spider or bulb shield'
- ^Bars are named according to the number of cans they hold: a four-bar holds 4 cans and vice versa.
References[edit]
- ^'LED bulb is by consuming Danish home'. avisen. Archived from the original on 22 April 2016. Retrieved 7 April 2016.
- ^Horst Bauer Bosch Automotive Handbook 4th Edition Robert Bosch GmbH, Stuttgart 1996 ISBN0-8376-0333-1 page 710
- ^GE. 'GE Lamp & Ballast Products Catalog — Section 8: Miniature, Sealed Beam and Automotive Lamps'(PDF). Reynolds Online. p. 31. Retrieved 19 December 2018.
- ^'The lights in Lighthouses'. photographers-resource.co.uk. Retrieved 9 January 2011.
- ^ ab'Par 64'. Blue Room. Retrieved 30 September 2018.
- ^BulbAmerica. 'GE Lighting Q20A/PAR56/C 20A Halogen Sealed Beam Lamp,PAR56,300W'. Google Express. Retrieved 19 December 2018.
With a mogul end prong (GX16d) base
- ^'OPTIMA LIGHTING PAR 64 & PAR 56 Lamp Holder'. BulbAmerica. Archived from the original on 27 July 2013. Retrieved 26 April 2018.
- ^'Hive Lighting - BUILT BRIGHT'. hivelighting.com. Archived from the original on 20 March 2018. Retrieved 26 April 2018.
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