go for the mh convo bulb man, the hortillux bulbs are way overrated, I bought one for a 600 watt parabolic and it didn't change a thing. They both have the same spectrum (horti and sylvy). You'll get a fast turn around with the mh during veg. good luck.
Specialist Reviewed by Specialist on . Money better spent on MH conv, or hortilux bulb? Hi, I have a 400w HPS ballast with a sylvania standard HPS bulb and I'm curious, do many of you use the EYE hortilux bulbs? Do you think I'd be better off going with an MH conversion bulb for the veg stage and then using this bulb that I have, or buying a hortilux HPS for the entire grow? Do you guys notice much of a difference with the hortilux bulbs? Do you think they're much better? Thanks in advance. Rating: 5