How to measure light in foot-candles, lumens and lux and the basic references that will help you to do so.
The higher the number of lumens, the brighter the light will be. On the other hand, watts measure the amount of power consumed by the bulb to produce that light. In the past, when incandescent bulbs were dominant, wattage was used as a general indicator of brightness. However, with the ...
In this article, we'll find out exactly what's going on here. We'll also see why black lights make some objects glow but not others, and we'll look at some interesting black light applications. What Is "Black Light"? If you turn on a black light bulb in a dark room, what you ...
Even if you never use the technically accurate definitions, the difference between the two is important to keep in mind, because when you measure lumens—the illuminance of a projector—you're not measuring the brightness of the image. However far you put a projector from a screen, it will ...
How does it feel in your hand? Is a tool required to change batteries? Light Output Measured in lumens. This is a measure of the intensity of the light coming out of the flashlight on the highest brightness setting powered by new batteries. It may also be shown for multiple light settings...
CFLs provide much more light at a fraction of the wattage of traditional bulbs. Because of this, CFLs are often categorized by lumens. Lumens measure the amount of light a bulb gives off, making this measure a more accurate way to tell how bright the new bulbs are in comparison to the ...
Lumens (lm) measure a bulb’s brightness. The higher the lumens, the brighter the lights will be. To adequately light your bathroom, you need at least 70lm – 80lm per square foot. Shop Light Bulbs Tip! Check out these12 Can't-Miss Bathroom Lighting Ideasfor more inspiration...
Summary: Calculating Total Lumens Needed for a Room Let’s recap how to gauge how much light you need for a space. Multiply your room square footage by the footcandle requirement. For example, a 100-square foot living room, which needs 20 foot candles, will need 2,000 lumen...
Take a look at your gaming room. You’ll want to pick a TV that fits the space well. The greater your viewing distance, the bigger the screen you can accommodate. Start by grabbing a tape measure and figuring out what size will suit you – there’s a great guide here to get you st...
How does a laser speed gun work to measure a car's speed? About the Author Matthew Weschler holds an MS degree in Physical Organic Chemistry from Florida State University. His thesis topic was picosecond laser spectroscopy, and he studied how molecules react picoseconds after being bombarded by ...