Planted Tank Obsessed
Join Date: Apr 2010
Location: Spokane Valley, WA
t5-HO for sure, but again, to pick one depends on the spectral graph. Check out the fixture first, see what light bulb fits in it (i.e. T5HO 18", 20", 24") then go to the bulbs manufacturer, usually online, and see if they have spectral graphs. Again, you are looking for peaks in the blue/orange/red. Noticable peaks. Remember that with T5HO comes high-tech responsibilities. You may be at Medium lighting, but with the intensity that T5HO gives off, you will need to look into pressurized co2, or a stringent diet of DIY CO2 and excel.
"The odds of winning are the same as being mauled by a polar bear and a regular bear in the same day"