lighting help

[snaggle]

I am building a new canopy for my 75 g tank and I got a MH from Canadian Man. I was wondering if I can get any 250W MH bulb or are there ones that only work with the ballast. Also is there any one who uses a 20,000K bulb I would like to see how blue it is?

For my new canopy I am using screw in 23W 6500K PC bulb, 4 48" actinic NO fluorescents, and a 250W MH I don’t know the K rating. There will be 4 of the screw in bulbs at either end of the tank I can fit two more in there if needed. Is that going to be enough light for my tank or will the ends look rely dark?

Brad