Kuri, I have the same light as you do and I haven't kept it that far away from my plants and didn't have a problem with that. Once, overnight part of my plant got a little burned so I did raise the light up but never four feet. I used the extensions that came with the kit, luckily I have vaulted ceilings so I can go pretty high up, I think the light was about two feet above the mature plants. But, I've only had two successful crops and I think that it was beginner's luck. Also, I had pretty nice clones for the first two crops and now I am using seeds and I don't even know what kind of seeds they are. Anyway, sounds like a good idea about the basket around the pump. I was thinking about doing something like that but couldn't come up with a good idea. Let me know how it works. I'll keep in touch. Willow