Think I agree Chinacat.....the ballast is digital and can use either type of bulb. We can't really do what Rhizome suggested as far as starting under one and then using the other so I believe we'll grab another hortilux and go with two. (PS did hook up the 170 (not 270) 4 inch inline to the reflector....already a bit cooler in the room.....especially with summer still ahead....:wtf


Bozo, thanks so much for the kind words.....I'll stop over and check your grow for sure.