Highest wattage for non-CO2 tank?

[kradeij]

Just out of curiosity, what is the highest wattage of light you guys have ever used for a non-CO2 tank without having a major algae outbreak.

For me, the highest was a 55W pl light for a 2ft tank. But I only have 8 fishes in my tank (4 platies + 4 cardinals) with 20+ Shrimps (cherries & yamatos) with Taiwan moss and hairgrass + E.Tenellus.

[bclee]

51W(15W FL + 36W PL) on 2ft (15gal) tank.

[mordrake]

3 x 150w mh for a 6ft (214G) tank.

6pm - 7pm ( 3 x 150W)
7pm - 9pm (2 x 150W)