hey, I've grown the plants the whole way on the 250 watt HPS light, draped mylar over the top and made a pretty enclosed tent with little light loss I'm now using 3 20 watt cfl sidelight in warm white. aswell, I used liquinure 8-4-4 veg fert for vegetative growth and flowered with canna bloom fert and a canna PK 13/14 bloom booster 1 week ago, I'm now using plain water. I have used like 7 gallon square pots. I used 18/6 light cycle and switched to 12/12 when plant 1 was 48 days 2. 54 days, and 3. 55 days. I then switched the lights to 11/13 2 1/2 weeks ago. I use a heat shield on the light and have a small hole in the roof letting air into the room, I then have a fan blowing air around the room. My temperature is ussually in the low 70's which isnt great but has done okay. thats about it really, my setup was even more basic and have kind of improved it as I went along. Ive got a question for anyone that knows, How long should a 250 HPS bulb last before changing it? thanks