Hi GCers, I'm new here. Been lurking for a long time now. Finally decided to put my thoughts down on so you guys could take a look. I need a stealth solution. I can't go the HPS/fans/carbon filter route. It's too much heat and too much noise. Instead I've decided to go with induction lighting (like CFLs but better) and a closed grow environment supplemented with CO2. This means I've only got to cool my light. No carbon filter, no huge fans and much, much less heat than a HPS setup. I'm going to build a pair of these loud speakers. The outside dimensions are 20" x 14" x 36". The grow chamber inside measures 18" x 12" x 30". I'm planning on using a push pull configuration with high quality, low noise, 100 cfm computer fans. They are speed controllable so I can dial in the noise and heat with the speed of the fan. These illustrations have one side and the top missing. Just imagine a 10" woofer and horn tweeter on one of the narrow ends. These will be fully functional loudspeakers. The gaps at the the top on each of the narrow ends allows air to be draw in on one side, pushed down past the bulb. The air is then pulled out the other side and exhausted through the gap near the top on the opposite narrow end. The inside of the air path will be painted matt black to help trap escaping light. Still with me? Here are some graphics that will hopefully make some sense. I'm planning on using 150 watt electrode less florescent lamp. One speaker will have a 2700 color lamp. The other speaker will have a 6500 color lamp. One speaker for vegging and one speaker for flowering. What do you guys think? I'm going soil until I get the hang of this. Then maybe DWC.