I'm starting a new tank 120cm by 60cm tall by 45cm wide. I have always used metal halides in the past, and found them excellent for plant growth (I use them in conjunction with pressurised co2 and ei dosing). I've heard so much about LED's, and am wondering if I should switch to them. Any...
I thought I'd post two comparison photos showing the difference between the ADA Solar I metal halide with NA-Green bulb (150w, 8000K) and 2x TMC GroBeam 1500 Ultima (2x 30w, 6500K).
ADA Solar I
ADA Solar I by George Farmer, on Flickr
TMC GroBeam 1500 Ultima
TMC 1500 Ultima by...