If your going to only have MH to start I like the 12K SE Reeflux lamps from Coral Vue. They prefere electronic ballast but will run on magnetic. They are the color of 14K SE, but are as bright as 10K. I have two 12K Reeflux 175W MH electronic ballast on my 58 gal. and they are 10 months old and haven't lost any foot candles