Lighting advice

[SmallFry]

Hi,

I'm looking at getting a light fixture for the 75 gallon I'm slowly setting up. I think I'm pretty set on T5 as I don't want to be dumping a lot of heat into the system - cooling is a problem in summer.

I like the look of the the Sunlight Supply Tek Light T5 48" 6 bulb fixture. My question is, what can I realistically keep coral wise with this light? The tank is 20" deep.

I was hoping to keep LPS, possibly some of the less demanding SPS or clams.. Is this achievable, or would I need metal halide to get anywhere with the latter?

Thanks in advance,
Rob.