54 watt = 5, 000 Lumens each Use only these High Output (H.O.) lamps in Tek-Lightâ„¢ T5, Sun Blaze®, Inner Sunâ„¢, Spectra Max, Ready Fitâ„¢ & New Wave® T5 fixtures. These high quality T5 HO lamps are excellent for all indoor gardening applications. Use the color of your choice for the growth phase of your plants. Mix & match for a full spectrum effect. 5, 000 lumens each. Lamps that are not marked H.O. will have significantly less output.