LED luminaire with electronically adjusted color balance

摘要: A luminaire comprises an array of LEDs that include at least one LED in each a plurality colors. Supplied to the for color is electrical current that, during measuring period, drive pulse having first boost portion and turn-off portion. The relating have light output which has nominal continuous value ordinary operation increases interrupted combined when supplied all array. photodiode arranged measure selectively turning off so measures separately response pulse. average period substantially equal as avoid visible flickers.