To replace a 100 watt (W) incandescent bulb, look for a bulb that gives you about 1600 lumens. If you want something dimmer, go for less lumens; if you prefer brighter light, look for more lumens. Replace a 75W bulb with an energy-saving bulb that gives you about 1100 lumens.
According to new U.S. energy efficiency requirements, beginning January 1, 2012, all across the nation, companies will no longer be able to sell or manufacture 100 watt light bulbs.
You will no longer be able to find or buy 100 watt bulbs. Instead, the highest you will find is 72 watts. In addition to this change, you will now find that light bulbs will no longer be categorized by wattage, but rather by lumens. A 72 watt bulb will now be referred to as a “1,500 lumens bulb” or a “2,600 lumens bulb.” Here’s a quick reference guide to see all bulb conversions.
With new technologies come new ways to measure those technologies. Meet the lumen: the unit used to measure the brightness of a bulb.
You may have noticed lumens on bulb packages, as the FTC now requires all bulb manufacturers to list information such as the number of lumens in a label smilar to nutrition labels on food. You may also be wondering what happened to watts and why they are being replaced.
Before LEDs, Watts were the standard way to estimate the brightness of bulbs. However, watts only measure how much power a bulb consumes, and with the introduction of new energy-saving technologies such as LEDs, power usage is no longer relevant when looking for the brightness of a light.
This is now expressed in lumens, which measure the amount of light they produce instead. The higher amount of lumens, the brighter the light will be.
All bulb packages are now required to display information in a label similar to this one, which includes the brightness in lumens and also life expectancy and the estimated energy cost per year.
Look for Lumens
As more and more energy efficient bulbs enter the market, you’ll start seeing less of the watt and more of the lumen. Use the numbers below to translate watts into lumens to ensure a perfect match when replacing incandescent bulbs with LEDs.
Note: these numbers are based on incandescent bulbs only and all numbers are estimates.
150 W ≈ 2600 lm
100 W ≈ 1600 lm
75 W ≈ 1100 lm
60 W ≈ 800 lm
40 W ≈ 450 lm
25 w ≈ 200 lm
Let’s use a better measure than lumens. This article equates 1600 lumens to a 100 watt incandescent bulb. I find that a directional led at 450 lumens matches the task illumination of a 100 watt incandescent, and assign this condition B4, a Brightness Number of 4.
It is the illumination not too blinding, that can be delivered from a 4″ circle, the minimum fixture on a ceiling junction box, and I think it is the ideal unit of light. Let’s adopt Brightness Numbers.
Just wondering, what type of lumens are used for bulbs? I deal with flashlights, which has exposed me to three types of lumens.LED Lumens: A measure of the light put out by the LED(s).
Does not take into account any lens/filter material in the final product (flashlight or bulb).
OTF Lumens (Out The Front): A measurement taken near or on the lens/filter of the final product. Usually taken at the brightest output location.
ANSI/NEMA FL1 Lumens: Measured using a capture sphere encompassing the product’s output. Averages the output of the product.
I’m pretty sure the FL1 is aimed at flashlights in particular, but is there a standard the bulbs are supposed to follow?
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