Informatika és tudomány

  • A1274815
    #20
    Találtam róla infót:

    " In 2012, Cree announced a white LED giving 254 lm/W,[51] and 303 lm/W in March 2014 .[52] Practical general lighting needs high-power LEDs, of one watt or more. Typical operating currents for such devices begin at 350 mA.

    Note that these efficiencies are for the LED chip only, held at low temperature in a lab. Lighting works at higher temperature and with drive circuit losses, so efficiencies are much lower. United States Department of Energy (DOE) testing of commercial LED lamps designed to replace incandescent lamps or CFLs showed that average efficacy was still about 46 lm/W in 2009 (tested performance ranged from 17 lm/W to 79 lm/W)"

    Wikipedia