Which to choose.... T'5 or HQI?

[dabandit]

Some halide ballasts and or cooling fans make a pretty loud hum, making them not practical for say a living room,but every t5 I've ever had was perfectlly quiet. But thaT said, I run a dual mh with vho supplement lol......but I have a special fish room. Running 2 250w halides over my 18'' deep tank has never caused a heat issue by the way 8'' above my tank