Lighting recomendation

I have a 36gallon half moon. It currantly has 2- t5 compact fluorescent 36 watt straight pin bulbs my max length is 16 inches to keep with the hood it has. I am thinking about ditchin the hood to get some custom lighting. In an attempt to make it to 4 watts a gallon. I posted some pics of the top give you guys an idea of shape. I am leaning towards some sort of clip on the back style but what do you guys think. If you guys could recommend specifics that would be appreciated. Maker, type mh, t5, or led. That would be cool.
Also while on the topic what is the negative to leds if any, mh, and t5? I may need a seperate thread for that.
http://pbckt.com/s1.nBE

 

150w MH clip on.. viper brand maybe.. would remove entire hood/glass/plasic. and maybe add a cooling fan..

http://www.fosterandsmithaquatics.com/product/prod_display.cfm?c=3578 3733 8075 15489&pcatid=15489


this one has a builtin fans, and led lunar moonlights.. but your paying for it..

http://www.fosterandsmithaquatics.com/product/prod_display.cfm?c=3578 3733 8075 19309&pcatid=19309

 

You could do a 4X24W T5HO if you don't mind a little overhang. I would look at ATI if you got the money or an IceCap retro. In any other brand look for reflectors that hand a little lower than the bulb. Hellolights has a retro that is lower priced than the IceCap.

Negatives:
LED most units PAR is unknown and there have been reports of hard corals not doing well long term.

MH heat, heat and heat plus fairly pricey

T5 more bulbs to replace when the time arrives