LED, 50W; 504 pcs x 0,09W, 3000K + 504 pcs x 0,09W, 6000K, 2835 SMD LED; effective lumens 3000K - 2553lm, 4000K - 2726m, 6000K - 2748lm; LED lumens 3000K - 6430lm, 4000K - 6660lm, 6000K - 6720lm; color temperature CCT by back switch 3000K-4000K-6000K