Lumatek MH Lamp Bulb Veg Grow 4k 6k Metal Halide Hydroponics 250 400 600 1000w

Luminous Efficiency (lm/W): 100 (4K) / 88 (6K). PAR (micromols/sec): 518 (4K) / 500 (6K). CRI: 65 (4K)/70 (6K). Luminous Efficiency (lm/W): 84 (4K) / 97 (6K). PAR (micromols/sec): 729 (4K) / 750 (6K).

eBay