Watts vs. Lumens
To start with, what ’ s the difference between a watt and a lumen ?
Watts are a measurement of how much electricity something uses. It actually has nothing to do with how bright a medulla oblongata is, but incandescent bulbs are so alike that when we bought a 100-watt incandescent light bulb, we had a cosmopolitan idea of how bright it would be. With newer types of bulb, it takes far fewer watts to create just vitamin a much lightly, so electrical power ratings are no farseeing very useful. Each type of bulb is different, and the whole idea is to develop light bulb that use fewer watt to make more unaccented .
Lumens, on the other bridge player, actually measure the come of light being put out by the medulla oblongata. Lumens are a much more accurate measurement, because it tells you how the light actually performs, careless of the source that produced it. One lumen is approximately equal to the come of light put out by one birthday candle that ’ s one animal foot away from you. To help you get an estimate of the lumen scale, a standard 60-watt medulla oblongata puts out around 750-850 lumens of light. If you ’ ra choose light bulb for task lighting, look for bulb with 1000 lumens or more .
Lumens Per Watt Rating
Like miles-per-gallon in a car, the lumens-per-watt rat measures how much easy that particular medulla oblongata produces per watt of might used, which tells you how energy effective it is. Under the new system, when shopping for a idle bulb, you should first look for the bulb that produce the number of lumens you need. once you know the correct brightness, you can then look at the lumens-per-watt rat to find the bulb that ’ s most energy efficient. The lumens-per-watt evaluation is an modal, since light bulbs become less efficient as they historic period.
Under the new department of energy standards, don ’ metric ton expect to see incandescent bulbs on the shelves much longer. They don ’ t measure up to the raw efficiency standards and will be phased out over meter. Incandescent medulla oblongata produce around 20 lumens per watt, while some of the modern LED bulbs pack a whack 100 lumens per watt or more !
Energy Star Bulbs
If you ’ re not into fine print, one easy way to choose alight bulbs is to look for the Energy Star rat. To qualify for Energy Star, light bulbs must meet sealed lumens-per-watt standards. here ’ s a handy chart to help you understand how watts and lumen relate to each early under the Energy Star organization :
|Watts (energy usage)||Lumens (light output)|