I at first bought a $30 GE MH to start out... well 14 days of 18/6 later, the fucking bulb died! Just didn't start one morning! I almost shit myself had to do a double take.. DARK tent, but noisy fan running?!
Anyway, I had a Hortilux HPS (for flower), and the hydro store was closed... I installed my HPS and was blown away by the quality of the bulb and the brightness...
I dug the 1 day of Hortilux so much, I sprung for a Hortilux blue MH ($120) to replace my blown bulb... wow, a LOT better bulb for SURE.
I noticed the GE threw off a bland, monotone, yellowish/off white light. The Hortilux MH throws this VIVID, deep, blue color... The plants looked way better under the Hortilux
& now I'm sold on Hortilux! I love it.