Hi! I decided to experiment with LED and bought a 135w UFO from Green Lamp on ebay: 135W LED UFO GREEN LAMP Grow panel better than 90W Light Board 3W LED Flowering 5060245415521 | eBay As far as the light goes, it seems to be doing good on vegging and happy with it so far....however the fans are well noisy. I'm using a secret jardin DP90, 90cmx60cmx60cm; and a S&P TD160 extract fan. The S&P is very quiet and not too noticeable but the UFO is annoyingly loud,even louder than 6" clip on fan for air movement inside the box. I contacted Green Lamp asking if I could customize it somehow with quieter fans and they replied with this... "Hello, We would not recommend altering the UFO as it needs the fan to keep it cool. Any alterations would be done at your own risk. Sorry we cant be of anymore assistants." Mmm, unhelpful and dyslexic. I bought another 2nd hand UFO at an ultra cheap price, one of those cheap looking Chinese jobs and the previous owner had replaced with Nexus fans and it's running quiet, so much quieter than the Green lamp UFO. Not getting a response from him about where he got it done or how or what needs to be considered in customizing so I'm turning to Grass City for any advice. Is there anyone out there who knows how to quieten the UFO and not destroy it by unplugging the wrong thing???