i like to use a MH for veg. then swap out to an HPS for flower. but an MH or HPS will work for the entire grow.
i dont have a cool tube yet but will get one. ive put a fan on the floor blowing straight up at the light. removed my reflector and lowered my HPS vertical so that the top of the bulb is about even with the top of the plants. i had my plants tied over so they were about the same height and had them surrounding the bulb about 10" away. from the side you can hardly see the bulb. it made all my lower buds alot bigger.
Hey guys. Its been a while since I've posted here but this is exactly what I'm doing at the moment but with my 400 and 250. Fan placed directly under lights and all my plants 8 to 10 inches away from bulbs. No heat issues at all. The good thing about growing this way is I think the initial stretch when flipped to flowering is substantially lessened. Some plants have stretched a bit but thats because of multiple strains, its nothing a small bit of training cant fix. So far, and its not been long, I would highly recommend this way of growing. We'll see at harvest. Good ventilation is a must of course. I've got quite a large fan for extraction(cant remember cfm at the moment) plus a carbon scrubber. Which is doing a fantastic job for me. Before I hooked it up you could smell the plants outside in the hall. I live in an apartment block.
Not good. I set it up quite snappy that day.
Thanks for all the help guys. I'll post a pic or two later when my lights come on.
