Ya u definitly cant use an HPS or MH system with any bulb except the power that its meant for...

However you end up rigging your lighting, remember one important thing...

BE CAREFUL!!!!!!!!!!!! Electricity is not meant to be messed around with and electicution or fires are possible if your not careful,

peace,
froze
frozentide Reviewed by frozentide on . HPS Question Hey guys I'm just wondering, I have a decently small box setup and with the CFL's I have now that I'm using for veg the temperature is about 82. Once I begin flowering I'm going to be using a 400W HPS system.. I have had all intentions on buying a cool tube (well a Bake A Round) but just in case the temperatures are still too high I could put a smaller bulb into the ballast without any problems right. Like a 250W ? Rating: 5