SATCO Lighting S49990 10W, 3 Foot LED T8, Medium Bi Pin Base, 3000K, 50000 Avg Rated Hours, 1450 Lumens, Type A, Ballast dependent

No rewiring. The S49990 is a Type A, ballast dependent lamp, which means it runs off the fluorescent ballast already in the fixture. You pull the old F25T8 or F30T8 lamp, drop this one in, and leave the wiring alone. The trade-off is that the lamp only works while that ballast is alive; if the ballast fails you either replace the ballast or move to a ballast bypass (Type B) lamp.

For general office, corridor and retail lighting, yes. The S49990 draws 10 watts and puts out 1450 lumens with 80+ CRI at 3000K, so you get fluorescent-level output at well under half the wattage. Where a space was lit by high-output 3-foot lamps or needs task-level brightness, do a count on your existing lumen total before swapping one for one.

3000K is a warm white, noticeably warmer and yellower than the 4000K cool white or 5000K daylight tubes most commercial fluorescent fixtures were lamped with. If your other fixtures are 4000K or 5000K, this one will read warm beside them. For a property manager standardizing a building, pick one color temperature throughout and relamp whole rooms rather than mixing within a fixture.

The lamp itself is listed as dimmable, but because it is a ballast dependent Type A tube, dimming depends on the fluorescent ballast and control in the fixture. If the fixture has a non-dimming instant or programmed start ballast, the lamp will not dim no matter what switch feeds it.

The S49990 is a glass tube. In food prep areas, gyms, parking garages or anywhere a lamp can be struck, specifiers usually want a shatter-resistant coated or plastic-bodied tube instead. For normal office and corridor fixtures with a lens or wraparound, glass is fine.

Rated at 50,000 average hours. Running 12 hours a day, that is on the order of 11 years of service, which is why MRO buyers usually relamp an entire area at once rather than chasing individual failures. Keep in mind the ballast is the other half of the equation on a Type A lamp.

Order Satco S49990. It is supplied in a gloss white finish tube, 10W, 3000K, 1450 lumens, medium bi-pin base. Each lamp weighs 0.31 lb, which keeps freight light on case quantities for a full-building relamp.