SATCO Lighting S49975 14W, 4 Foot LED T8, Medium Bi Pin Base, 3000K, 50000 Avg Rated Hours, 2200 Lumens, Type A, Ballast dependent

The S49975 is a Type A lamp and it runs off the existing ballast, so it drops into the sockets with no rewiring. Satco lists it as ballast dependent with a ballast required. That means the ballast has to be a working, compatible unit; when the ballast eventually fails you either replace the ballast or move to a ballast bypass (Type B) lamp. For a quick relamp across a building, Type A is the fast path because nothing inside the fixture changes.

Yes. The tube is a 48 inch T8 with a medium bi-pin base, which is the same lamp length and pin base as a standard F32T8 fluorescent, so it seats in the same tombstones. Burning position is universal, so the fixture can be mounted horizontally, vertically or in a troffer.

3000K is a warm white, noticeably warmer than the 3500K or 4000K found in most commercial office relamps. If your existing tubes are 4100K cool white, this will read yellow next to them. It is a fixed color temperature, not selectable, so mix carefully: keep 3000K to spaces you are doing end to end, like hospitality areas, lobbies or residential common corridors. CRI is 82.

No, not where it is exposed. The S49975 is rated for indoor use and damp locations only, so an enclosed damp interior space is fine but anything seeing direct water or weather needs a wet location rated fixture and lamp.

At 14 watts the lamp puts out 2200 lumens with a 210 degree beam spread, which is a drop from the roughly 2800 to 3000 lumens a typical 32W fluorescent delivers when new. In a multi-lamp troffer or a corridor it reads fine, especially since fluorescent output depreciates with age. For a space where you are already at the low end of your footcandle target, or a single-lamp strip over a work surface, step up to a higher-lumen T8 instead.

The lamp is listed as dimmable, but it is a Type A lamp running on the fixture ballast, so dimming performance depends on the ballast in the fixture being a dimming ballast with a compatible control. On a standard instant-start or rapid-start non-dimming ballast you will get full output only.

It covers 120V through 277V at 50/60Hz, so the same lamp works on 120V residential and multi-family circuits and on 277V commercial lighting branch circuits. Current draw is 0.117A down to 0.051A across that voltage range, which is what you use when you recalculate circuit loading after a relamp.

The tube body, base and lens are glass with a gloss white finish, and the lamp weighs 0.41 lb. Glass is the more common construction and handles heat well, but in a food prep area, gym, or anywhere a shatter-resistant lamp is specified, look for a coated or plastic-bodied tube instead.

Average rated life is 50,000 hours. At 12 hours a day that is roughly 11 years of service, which is the main reason MRO and property maintenance groups convert fluorescent strips to LED even when the ballast is still good. Keep in mind that as a Type A lamp its real service life is also tied to the ballast staying healthy.