SATCO Lighting S29851 9W LED PL 4-Pin, 3500K, 1050 Lumens, G24q Base, 50000 Avg Rated Hours, Type A, Ballast dependent

Yes, if the existing ballast stays in place. The S29851 is a Type A, ballast dependent lamp, which means it runs off the fixture's existing CFL ballast with no rewiring and no ballast bypass. Drop it into a 4-pin G24q socket and it operates like the compact fluorescent it replaces. If the ballast has failed, this is the wrong lamp for that fixture, since a Type A lamp will not run on line voltage.

No. The S29851 has a G24q 4-pin base, which only seats in a 4-pin G24q socket. Two-pin G24d sockets are a different pin configuration and are used with magnetic ballast fixtures that have a starter built into the lamp. Count the pins in the socket before ordering, and if it is a 2-pin socket you need a 2-pin lamp instead.

At 9 watts and 1050 lumens, this LED PL is the usual swap for a 26 watt 4-pin compact fluorescent, which runs in the same lumen neighborhood. Output is 1050 lumens with a 120 degree beam angle, so light spread stays wide, similar to the CFL it goes in for, in downlights and recessed cans.

3500K is neutral white, between the warm 2700K/3000K used in residential spaces and the cooler 4000K often specified for offices and corridors. If the rest of your fixtures are 3500K you will match; mixing 3500K with 4000K in the same room or hallway will read as a visible color difference. CRI is 80+, so color rendering is in line with standard commercial lamps.

The lamp itself is listed as dimmable, but because it is a ballast dependent Type A lamp, dimming depends entirely on the fixture's existing ballast being a dimming ballast and on the control wired to it. On a standard non-dimming CFL ballast the lamp will simply run at full output.

Rated life is 50,000 average hours. For a property manager relamping stairwells, garages, or corridor downlights on long burn hours, that is a far longer service interval than a typical plug-in CFL, which is the main reason crews make this swap while reusing the existing ballast and socket.

Order it as Satco S29851. It is supplied with a frosted lens, which diffuses the LED sources so you do not see individual diodes through an open downlight trim or a louver. Lamp weight is 0.18 lb, and country of origin is China.

Satco publishes a PDF spec sheet for the S29851 covering the 9W output, 3500K color, 1050 lumens, G24q base and 50,000 hour rated life, which is what most submittal packages need for a lamp line item. The document is linked in the product specifications.