Best/brightest T8 bulb?

[swifty]

I have a T5NO dual lamp fixture from Aqueon on my 29g. I setup a 20g long growout today, and chose a T8 fixture since I don't plan to put as many plants in there as there are in my 29g.

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The hood I have is for a single tube, and I put one of those in there today. It just seems a little on the dim side. Not sure if I'm too used to the T5 or what, but it just seems dark.

My question is, what is the brightest T8 bulb, or is there any better than what I have now?

I understand it wont be as bright as the dual T5NO, but is there anything brighter than this?

 

[Mebbid]

Depending on the age of the bulb there isn't really much you can do to increase the output aside from modifying the fixture itself. The t5s put out way more light than the t8s