Snoop - No... I have a 430 Hortilux bulb for my 400 but I just bought a used 600 system that has a 3 month used Sylvania 600 bulb in it. Thinking I should get a better quality bulb. But I still question the need for a hortilux when I'm reading it's good for veg growth.

I vegged them (at the end) with a 400 MH conversion bulb. Moved them to 12/12 whilst short. They went nuts after putting them in 12/12.