Sorry took me a while to get this response! I was curious because I have a close friend who has been following my grows and experiences with LED's, after my most recent endeavour he now wants in but doesn't have the funds to hand, me being a great friend I have given him one of my units on the condition that he pays me a little every month for it so he can afford to get his grow under way, well 3 days ago. So realistically I now only have one unit and was going to put the money my friend gives back to me towards rebel upgrades for my remaining 0006 unit. I could either do 2, 4 or all 6 depending on how long I wait before upgrading - I have no grows going on right now so I can bide my time a little. If I'm lucky I might be able to afford another 0006 and upgrade the two middle modules for each unit - any views on how they would perform? I'm guessing better coverage for a start.