SATCO Lighting S29850 9W LED PL 4-Pin, 3000K, 1050 Lumens, G24q Base, 50000 Avg Rated Hours, Type A, Ballast dependent

At 1050 lumens the S29850 lands where a 26 watt 4-pin CFL sits, so it is the usual swap for a 26W PL-C or PL-T in a downlight or wall sconce. You are pulling roughly 9 watts instead of 26 for the light output, and the lamp is rated 50,000 average hours, which is why property managers use these on high-ceiling and stairwell fixtures they don't want to relamp often.

3000K is warm white, the softer end of what commercial spaces use. It reads warmer than the 3500K or 4000K typical of open office and back-of-house, and it is the color most hotels, multi-family lobbies, corridors and patient-comfort areas standardize on. If the rest of your building is on 4000K lamps, the S29850 will visibly mismatch, so match the Kelvin across the fixture group rather than the individual can.

Because the S29850 is ballast dependent, the existing ballast has to be an electronic type that the lamp is compatible with, and it has to be working. Two practical consequences: if the ballast fails, the lamp goes out even though the LED is fine, and if your fixture has a magnetic ballast or a burned-out one, replacing it or converting the fixture to line voltage is part of the job. Facilities buyers standardizing a building on Type A lamps usually survey ballast type per fixture family first.

Dimming on a Type A lamp is a function of the ballast driving it, not the lamp. The S29850 runs off the fixture's existing ballast, so if that ballast is a non-dimming electronic ballast, which most 4-pin CFL ballasts in commercial downlights are, the lamp runs at full 1050 lumen output and does not dim. Where you need dimming control, plan on a direct-wire LED PL lamp with the ballast removed instead.

G24q is the 4-pin twin-tube CFL base, and the S29850 uses it, so a lamp marked G24q-1, -2, or -3 is coming out of a socket this lamp seats in. The identifying details to order by are the Satco part number S29850, 9 watts, 3000K, 1050 lumens. Anything marked G24d is the 2-pin version and is a different socket entirely.

The S29850 throws 120 degrees, a wide flood spread rather than a directional beam, so it fills a can or a horizontal-mount fixture much like the omnidirectional CFL did. Where it differs from some LED PL lamps is that it is not a narrow directional source, so you are not fighting a hot spot on the floor. In an enclosed or lensed fixture, expect the same general wash of light, just at 1050 lumens.

Frost is the only finish the S29850 is built in. That diffused frosted housing softens the LED chips so you are less likely to see individual diodes through an open-bottom can or a bare-lamp sconce.