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Luminous Flux: Symbol Φ, Unit: lumen( Lm), Definition:: The rate of flow of light per unit of time, especially the flux of visible light expressed in lumens. Luminous flux in lumens = Radiant power (watts) x 683 lumens/watt x luminous efficacy.
IP(INTERNATIONAL PROTECTION)is defined by international standard IEC 60529, it classifies the degrees of protection provided against the ingress of solid objects ,and liquids in electrical enclosures..
Magic plant photosynthesis, is expected to help mankind to achieve the dream of clean energy. Recent years the researchers are trying to use this feature to make the extremely low-cost and real green solar cell: Third generation solar cell: dye-sensitized solar cell (DSC).
Have you been thinking of beautifying your yard? Maybe the solar yard lighting is a way for your choose.It is a great way to finish off the landscaping without running cables all over the yard or digging trenches to bury them. These lights do not require any cabling and are easy to install anywhere you want as long as they get direct sunlight throughout the day. At night, they will automatically illuminate your backyard. There is no need to remember to turn them off or on.
LED flashlights are the development of the bulb flashlights, and wil be more and more used. Thousand years ago, man already begin to use firewood to lighting and grill food, he advent of industrialization has changed all that, making man dependent on electricity.
LED technology for street lights is advancing quickly, are the led street lights ......
Solar landscape lighting is very popular these days, solar brick, ......
We have always used the energy of the sun as far back as humans have ......
Solar lighting lamp uses highly efficient mono crystal (multi crystal) ......
2009-7-9
In certain semiconductor material PN knot,Which will theminority ......
2009-7-9
LED Lighting means the light source of the lamp is LEDs, ......
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