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A lumen is a measure of how much total light a bulb produces. Incandescent (1156) bulbs spray their light through almost 360 degrees and lamp housings designed for them rely on that. Most LED lamps put all their light out in a narrow cone and work poorly with standard 1156 housings. However, there are LED assemblies that have their light-producing chips arranged around a sphere and they work well in standard housings.

The LEDs you see on commercial vehicles are mounted in housings designed for their narrow cone output, that's why they look bright.

A standard 1156 bulb puts out about 400 lumens when new. As of January 2010, I haven't found an LED replacement that puts out any more, and most are only 50 lumens or so, not enough for a standard 1156 housing.

To confirm the above: From Bosch Automotive Handbook7th ed. a 1156 (BA15S) Stop/Turn 21W bulb puts out 460 lumens. For a 5W Side marker / Tail BA15S it is 50 lumens (strangely low, I know) and 10W Tail light 125 lumens.

If replacing with a warm white LED, then that is how many lumens you need to match the brightness (as well as light direction being good). BUT, if using a Red LED for a brake light or an Amber LED for Turn signals, then less lumens are needed. This is because the Red lens of a brake light filters out all the blue, yellow, green, etc out of white light, but filters nothing from a Red LED. The question now is: What is the percentage of "Red" in the light output of a "White" incandescent bulb?

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โˆ™ 2010-08-26 10:54:23
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Q: How many lumens for an led replacement vs stock 1156 bulb?
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How may watts is 400 lumens?

Bulb brightness in LumensA 100 watt Bulb is rated at approximately 1700 lumensA 60 watt incandescent bulb is rated at approximately 800 lumensA 40 watt bulb is rated at approximately 400 lumensA 25 watt bulb is rated at approximately 180 lumensA 4 watt night light bulb is rated at approximately 20 lumens


How many lumen's is a 1156 automotive bulb?

402 lumens initially for 27 Watts in, according to GE at http://genet.gelighting.com/LightProducts/Dispatcher?REQUEST=COMMERCIALSPECPAGE&PRODUCTCODE=26962


How many lumens are in a 1000 watt incondescent light bulb?

A 1,000 watt is 15,000 lumens. A 100 watt bulb is 1,500 lumens.


How many lumens for an led replacement vs stock 1157 bulb?

A 150 lumen red LED will be as bright if the tail light lens is red. A 220 red led will be brighter than a regular 1157. The colored lens will make a white led bulb not as brighter due the filtering affect it has on the light wave lengths. A white LED replacement would have to be 400 lumens to equal the 1157's brightness.


How bright is 140 lumens?

A little bit less than a 25 watt incandescent bulb - the the table below:Bulb brightnessA 100 watt Bulb is rated at approximately 1700 lumensA 60 watt incandescent bulb is rated at approximately 800 lumensA 40 watt bulb is rated at approximately 400 lumensA 25 watt bulb is rated at approximately 180 lumensA 4 watt night light bulb is rated at approximately 20 lumens


How many Lumens in a 100Watt MH bulb?

How many lumens are in a 100 Watt Metal Halide bulb


Lumens in a 50 watt bulb?

Could be 500 lumens for a incandescent lamp, or 2500 lumens for a fluorescent.


How many lumens will a 40 watt bulb produce?

It depends on the bulb and its efficiency. A typical 40 watt incandescent bulb puts out about 475 lumens.


How many lumens does a 3W LED warm white GU10 bulb produce?

its between 30 lumens per bulb


How bright is an led bulb marked 100 lumen?

Brightness is measured in lumens so the bulb has a brightness of 100 lumens. The electrical power the bulb uses is measured in watts. The efficiency of a bulb is expressed in the number of lumens produced per watt of electric power.


How many lumens are in a 150 watt incandescent light bulb?

2600-2800 lumens


How many lumens are in a 500 watt hallogen light bulb?

50, 000 lumens


How many lumens in a 150 watt bulb?

A 150 watt halogen bulb will give off somewhere around 2000 lumens. These lights may give off up to about 2400 lumens.


How many lumens in a 20 watt halogen bulb?

Approximately 15 lumens per watt for halogen, so 300 lumens.


How many lumens in a 150 watt halogen bulb?

A 150 watt halogen bulb will give off somewhere around 2000 lumens. These lights may give off up to about 2400 lumens.


How many lumens in an 85 watt incandescent bulb?

A guide figure for an incandescent bulb is 10-12 lumens per watt for ordinary incandescent, 15 lumens per watt for halogen type.


Is a 35 lumens bulb as bright as a 60 watts bulb?

Lumens measures how bright it is, watts measures how much electric power it uses up. An old-type incandescent bulb produces about 10 lumens per watt. A halogen produce about 13 lumens per watt. A fluorescent (energy saving) bulb produces about 50 lumens per watt. LEDs produce somewhere around the same as a fluorescent.


How many lumens in a 1141 bulb?

21


How do you measure the brightness of a light bulb?

In Lumens, not Watts. Lumens is a measure of the perceived power of light.


How many lumens per watt in a fluorescent bulb?

if T8model 40 x90 =3600 lumens


What is the difference between a 1156 bulb and a 1157 bulb?

1156 is a single element lamp (reverse light, tail light) 1157 is a dual element lamp (brake light and turn signal light in one bulb)


How many lumens from a 100 watt rough service incandescent bulb?

It will probably be stated on the packet, but I doubt it will be higher than the standard bulb which is about 1200 lumens.


What type of bulb does the aux. lights on a del sol take?

it takes a 1156 bulb


How many lumens in a 100w light bulb?

1500


How bright is 950 lumens?

950 lumens is slightly less bright than the output of a 100 watt incandescent bulb. (100 watts = 1160 lumens, 60 watts = 630 lumens)