SATCO Lighting S29853 9W LED PL 4-Pin, 5000K, 1100 Lumens, G24q Base, 50000 Avg Rated Hours, Type A, Ballast dependent

It needs the ballast. The S29853 is a Type A, ballast dependent 9W LED PL lamp, so it runs off the fixture's existing CFL ballast with no rewiring. Pull the old 4-pin CFL, drop this in. The tradeoff is that when the ballast eventually fails, the lamp stops working until the ballast is replaced or the fixture is converted to line voltage with a Type B lamp.

At 1100 lumens, the 9W S29853 covers the output range of a typical 18W to 26W 4-pin CFL while drawing 9 watts. Check the lumen rating of the lamp you are pulling out rather than the wattage alone, since older CFLs lose output with age and the LED holds its 1100 lumens.

5000K is a daylight white, noticeably bluer than the 3500K or 4100K most office and corridor fluorescents ran at. It reads clean and bright in stairwells, garages, laundry rooms, utility and back-of-house areas. If you are relamping only part of a building, mixing 5000K lamps into 3500K fixtures on the same sightline will look obviously mismatched, so standardize by area. Color rendering is 80+ CRI.

The lamp itself is listed as dimmable, but because it is a ballast dependent Type A lamp, dimming performance depends entirely on the CFL ballast in the fixture. On a standard non-dimming electronic CFL ballast you get full output only. A dimming CFL ballast is required for any dimming at all.

Satco S29853 is the part number, and it comes one way: frost finish, 9W, 5000K, 1100 lumens, G24q 4-pin, Type A ballast dependent. There are no finish or color temperature options under that number, so if you need 3000K or 4000K in the same lamp family you are looking at a different Satco part number.

120 degrees, which is a wide wash rather than a spot. In a recessed CFL downlight or a surface drum that is close to the omnidirectional spread of the CFL it replaces, so you generally keep the same light pattern on the floor. It is not a substitute for a narrow-beam reflector lamp if you need accent punch.

50,000 average rated hours. For a property manager running a corridor or stairwell fixture around the clock, that is roughly a decade of service, which is where the labor savings sit on a multi-family or institutional relamp. The limiting part becomes the ballast, not the lamp, since this is a ballast dependent design.

Aluminum and plastic construction, 0.18 lb per lamp. The aluminum section is the heat sink behind the base, which is why these lamps are heavier and bulkier at the base end than the CFL they replace. In tight recessed cans or shallow enclosures, confirm there is clearance behind the socket before committing to a large order.