Light meters are a godsend for photographers, as they tell them how much light is either falling onto the subject of the shot ...

an Extech light meter, a Solarmeter digital ultraviolet radiometer, and a UVP handheld longwave UV lamp. Our setup for the lens performance test of overall light penetration was quite the rig.

Lux meters, sometimes called light meters, measure the intensity of illumination as distinguished by the human eye. This value does not correlate to an objective value of energy radiated or reflected, ...

This light meter allows you to measure light and distance so you can exposure and focus your images more accurately when ...

Light meters, such as this classic Sekonic L398, often read light in footcandles. Convert to lux by multiplying by 10.7639, or 10.8 if you're feeling approximate All of this is why we use the standard ...

A group of Dutch scientists have been testing out some of today’s “smart” electrical meters to check their ... combined dimmers with energy saving light bulbs and LED bulbs.” ...

Lux Meter An illuminometer designed to measure illumination in terms of luxes. Lux / Foot Candle Meter An illuminometer designed to measure illumination in terms of luxes or foot candles. Search Logic ...

You can never have too many meters at your disposal and we’ll have to keep this article in mind the next time we’re shopping for another. Never used a multimeter before? Take a look at the ...

Here’s how it works. The speed of light traveling through a vacuum is exactly 299,792,458 meters (983,571,056 feet) per second. That's about 186,282 miles per second — a universal constant ...

The 192 individual beams of light, grouped in bundles of four, will travel the length of a hulking building 700 feet (213 meters) long and 400 feet (122 meters) wide. Entering a switchyard of ...

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This innocuous gadget gives you a live look at temperature and humidity, indoors and out; but there’s not much more to it.