HQI 70w on 29g?

Yeah exactly like KrackerG's setup.
I figure I might as well just upgrade this setup since I've already spent the money on it. I can't afford to sell this and buy a new fixture. Plus it'd cost $95 for a kit without the bulb from a guy on nano-reef.com. Then I can buy a $40 bulb for it from Catalina. Just gotta find the link...

I forgot about his 30" CSL setup. It's the same bulbs as my 24" CSL, but a little longer and with 2 70w HQIs. I'm not sure if a 150w might be too much light for softies. I guess I'll try out 1 70w and if growth seems too slow or I don't like the shadows, I'll just buy another 70w.

Thanks for the help!

Really?

I read somewhere that double ended bulbs where twice as powerful as single ended bulbs. So the 70w HQI should be like a 140w single end. Is this true? Are they really any more powerful than single ended bulbs? I know they don't wear out as fast and I think they use less electicity, but other than that, what is the benefit? Perhaps I should post this question in another post?

A 150w would be squeezed in right next to my power compacts. Do you think I need to worry about the heat shattering them? I'll have 2 fans, one on each side, but it'll still be a little crowded. Also, should I worry about a 150w melting any of my softies? I'm going to build a sps tank in a couple years, so I'm not going to need to upgrade this tank. Softies only for me.

How do you know if a light is too strong/too weak for a certain coral other than trying it out and seeing if the coral flourishes? Would a lux meter ($60-70 I think) be a good investment? How much/many lux do softies like? How many is too much and how many is too little?