That's interesting. What type of reflector were the t5's using? Or was this bulb only (i.e. no reflectors or glass in the case of the MH HQI).

:mrgreen: and what a face it is. There,s a story behind the pic, but thats for another thread.



Steve, I agree with fkshiu but cant argue against your answers. Sheez, no wonder I look like that. :smile: I still think its an unfair comparison, as the idea is to light the entire tank and then measure par in the tank, which would require multiple bulbs and good reflectors.

I still also say one needs to run a quality halide. Some of the cheaper higher "k" bulbs dont even come close to the intensity in my tank from just four T-5,s. How do I know? I ran them. :smile:

In real life and not metered measures, my sps corals are growing fine and have good colour. They did not do that under halides, for me. And my tank is 2ft. deep, although I dont have any on the bottom, which I could running halides. But then I still only run 4 bulbs.

Anyways, have to go and think of somemore points to try make. :smile: I do appreciate you going out and doing the measures for us.