SATCO Lighting S29911 25W T5 LED, Miniature bi-pin Base, 5000K, 50000 Avg Rated Hours, 3500 Lumens, Type A, Ballast dependent

Yes, that is exactly what this lamp is built for. The S29911 is a Type A, ballast-dependent lamp, so it runs off the fixture's existing fluorescent ballast with no rewiring and no ballast bypass. Pull the old T5 tube, put this one in the same miniature bi-pin sockets, and you're done. The trade-off is that you stay dependent on that ballast, so if the ballast fails later the lamp goes dark until it's replaced.

It uses a miniature bi-pin base, the same socket type a standard T5 linear fluorescent uses, in a T5 tube diameter. Burning position is universal, so it works in fixtures mounted vertically, horizontally, or at an angle.

5000K, a cool daylight white, with a CRI of 82. It is not a color-selectable lamp, so you get 5000K only. If the rest of your fixtures are running 3500K or 4000K tubes, mixing in this one will read noticeably bluer in the same space, so plan to relamp a whole room or run at a time.

Yes on both counts. The S29911 is an enclosed rated lamp, so it can go in a sealed or gasketed fixture without cooking itself, and it carries a damp location rating. Damp covers covered exteriors, parking garages, and bathrooms. It is not rated for wet locations with direct water exposure.

It puts out 3500 lumens at 25 watts, which Satco rates as a 100W incandescent equivalent. For a shop, corridor, or parking structure that's a solid one-for-one swap on light level while cutting draw. Current runs 0.208 to 0.090A depending on supply voltage, over a 120V to 277V range at 50/60Hz.

The lamp itself is listed as dimmable, but because it is a ballast-dependent Type A lamp, the dimming is controlled by the fluorescent ballast in the fixture, not by the lamp. If you have a dimming T5 ballast on a 0-10V or similar control, you keep dimming. On a non-dimming ballast the lamp will not dim no matter what control you put upstream.

Rated at 50,000 average hours. On a 12 hour a day schedule that's roughly 11 years of service, which is why MRO and property teams favor these on high-ceiling or hard-access fixtures. Keep in mind the ballast is still in the circuit, so ballast life, not lamp life, often decides when the fixture next needs attention.

Go Type A, like the S29911, when you want the fastest relamp possible: no fixture rewiring, no licensed electrician required for the swap, and the existing ballast stays. Choose a ballast-bypass (Type B) lamp instead when the ballasts in those fixtures are already aging or failing and you would rather take them out of the circuit for good, accepting the rewiring labor and the need to re-label the fixture. For a large installed base of healthy T5 ballasts, Type A is the lower-labor path.

Beam spread is 185 degrees, so it throws light slightly past a flat half-sphere rather than wrapping fully around the tube like a fluorescent does. In a reflector troffer or strip fixture that works in your favor since nearly all the output heads down into the space instead of bouncing off the housing. A gloss lens diffuses the output.

Aluminum and glass construction. The aluminum section acts as the heat sink for the LEDs, which is what allows the enclosed-fixture rating, and the glass carries the gloss diffusing lens.