24 watt = 2,000 lumens
39 watt = 3,300 lumens
54 watt = 5,000 lumens

Use only these High Output (H.O.) lamps in Tek-Light™ T5, Sun Blaze®, Inner Sun™, Spectra Max, Ready Fit™ & New Wave® T5 fixtures.

Lamps that are not marked H.O. will have significantly less output.