SATCO Lighting S21924 14W T8 LED, 4Ft, 6500K, Medium Bi Pin Base, 50000 Avg Rated Hours, 1800 Lumens, Type B, Ballast Bypass

Yes. The S21924 is a Type B ballast bypass lamp, so the fixture's fluorescent ballast has to be removed and line voltage wired direct to the sockets. It will not run on an existing instant start or rapid start ballast. If you want a lamp that drops into the fixture untouched, you need a Type A (ballast compatible) tube instead.

Either. The S21924 accepts single ended or double ended wiring, so it works whether you bring line and neutral to one tombstone or split hot to one end and neutral to the other. That matters when you are retrofitting a fixture with non-shunted sockets on one end only.

It depends on what is in the fixture. Type B bypass lamps require non-shunted tombstones when wired single ended, because hot and neutral land on separate pins at the same end. Many older instant-start fluorescent fixtures use shunted sockets, which have to be replaced. Double ended wiring will work with either socket type, so confirm what you have before you order socket kits.

6500K is daylight white, a crisp blue-white. It reads well in warehouses, shops, garages, parking structures, and back-of-house areas. For offices, corridors, and most tenant spaces, buyers usually standardize on 4000K or 3500K instead, so keep 6500K for the utility spaces unless the whole building is already daylight.

1800 lumens on 14 watts. A typical F32T8 fluorescent pulls 32 watts, so you cut lamp wattage by more than half and drop the ballast draw entirely. Light output is lower than a high-output 32W tube, so in spaces lit to a tight footcandle target, check your existing fixture count before swapping one for one.

Order Satco S21924. That is the 14W, 4 foot, 6500K, medium bi-pin, Type B ballast bypass tube in gloss white, and it is the single configuration offered under that number, so there is no wattage or color option to get wrong on a reorder.