With the known tonnage (or BTUs), the SEER rating, and the HSPF rating, we can calculate almost exactly how much electricity a heat pump use (watts, kWh usage) per hour, per day, and even per month. Based on that, we can calculate how much it costs to run a heat pump per hour...
Dividing these two numbers, we get the number of lumens each lamp can produce for a single watt of energy. Looking at the chart here, you can see that LEDs are considerably better than CFLs on this measure, which are in turn much better than incandescent lamps. Chart: Lumens per watt: ...
This current, together with the cell's voltage (which is a result of its built-in electric field or fields), defines the power (or wattage) that the solar cell can produce. That's the basic process, but there's really much more to it. Next, let's take a deeper look into one ...
Additionally, since most projectors currently use high-pressure mercury lamps, which generate extremely high heat, non-glass lenses have lower heat resistance. Under the same temperature and prolonged use, they are prone to deformation, resulting in unclear images. We recommend:Most high-end or comm...
The amount of bending, or angle of refraction, of the light wave depends on how much the material slows down the light. Diamonds wouldn't be so glittery if they didn't slow down incoming light much more than, say, water does. Diamonds have a higher index of refraction than water, ...
If you want to see a hologram, you don't have to look much farther than your wallet. But the most impressive holograms are large scale and illuminated with lasers or displayed in a darkened room with carefully directed lighting. Learn how a hologram, lig
These transform plate boundaries rarely produce volcanic activity. Volcano Formation Flowing lava on Kilauea Volcano in Hawaii Photo courtesy USGS Magma can also push up under the middle of a lithosphere plate, though this is much less common than magma production around plate boundaries. This ...
High-intensity lights like HID lamps must be placed further away (around 24-36 inches) because they produce more heat. On the other hand, LEDs, which produce less heat, are placed closer to the plants (around 12-24 inches). What is the light duration?
Too much moisture increases the risk of insects, fungi, and other pests. Heat Lamps In extreme cases, heat lamps with a 100-watt bulb can keep trees warm, especially if placed under a cover to protect saplings. However, this risks burning the tree, so be careful that the lamp does not...
Incandescent lamps also lose more energy through heat emission than do fluorescent lamps. Overall, a typical fluorescent lamp is four to six times more efficient than an incandescent lamp. People generally use incandescent lights in the home, however, since they emit a "warmer" light -- a ...