A 28W T5 produces about the same light output as a 32W T8 and a 54W T5HO produces close to twice the light output of T8 and T12 lamps when these lamps are operated as part of a ballasted lighting system. The nominal light output of a four-foot 54W T5HO lamp is 5,000 lumens, compared to 2,900 lumens for a 28W T5 lamp and 2,850 lumens for a 32W T8.
As a result of the same or greater light being produced from a smaller area, T5 lamps appear brighter and of course so do T5HO lamps. T5HO lamps are not recommended for fixtures where the light source is directly visible. They are too bright. However, this characteristic makes them ideal for compact indirect fixtures.
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