I have the current orbit led
fixture over my 40b right now. I just put some corals in yesterday or the day before and they seem to be loving it. They are all open and look good already, even better than they did under the 4 t5's I had over them. They are definitely not enough for a deep tank but in my instance they will be just fine for lps
The fixture is very neat and has some nice settings, like the cloud cover and such plus the timer and the built in settings are very useful.
I'm not sure they will penetrate down to the bottom of a 29g though.....
I also got the 36-48 inch version instead of the 24-36 inch one which gave me some extra leds and it lights the entire tank from left to right.