it depends. What are you applying it to. What size tank? What is your objective? Are you reafing or planted tank? Worth, well worth is a matter of perspective, what is your perspective?
Still too much imo. The w/g rule doesn't scale up for such large tanks. I'm sure with massive CO2 injection, ferts, very short photoperiod, you could pull it off, but having so much light makes for a finicky tank.
Although, 150's are pretty tall right?
I'm aware of that, but the picture does not show such reflectorsT5's with the proper parabolic reflectors will penetrate even the deepest tanks. There is a post on reefcentral about how T5's will penetrate just as deep and as MH. And in some cases be even better. I agree that even with a 150 that is way to much light. I wouldnt go over 300 watts, but then again we need the advice of the big tank guru's.
30" tall shouldn't be a problem. My tank is 24" tall and I have the fixture raised about 4-5" above the tank's surface. Great growth.My tank is 30" deep, I wonder?
Definately not true. While, I agree that ahsupply is a great bang for the buck and probably the best deal out there for PC's, they shudder in comparison to T5's. PC's have a lot more restrike due to the curved bulb and therefore lose a lot of intensity. ahsupply/PC's are cheaper, but not better. Especially due to the depth of this 30" tall tank, PCs would be a bad choice. T5's also burn cooler, so no fans or vents needed.Bri said:ahsupply will give you the same, if not more for a lot less.
I might disagree. The efficiency difference is slight, yes, and restrike limits CF as well. But AHSupply uses good reflectors that provide less restrike than a T5 with a flat reflector. So comparing AHSupply to a cheap T5 setup, yeah I might say they will give you the same, if not more (and a lot of times for less).. And the focus of the AHSuply reflectors are probably about the same as like the Tek (anyone with both verify this?) so depth of tank is going to effect both the same, so no advantage with one over the other just due to depth. There would be an advantage, if one particular type had a tighter focus, providing of course it still spread enough light evenly over the plants (not talking about a laser lol). However on that cheap setup, 30" is probably going to impact the light as much as the difference in restrike is, or more.