SATCO Lighting S8537 9W LED PL 2-Pin, 3500K, 950 Lumens, G24d Base, 50000 Avg Rated Hours, Vertical, Type B, Ballast Bypass

The S8537 is a Type B ballast bypass lamp, so the existing CFL ballast has to come out and line voltage is wired direct to the lamp sockets. Leaving the ballast in circuit is not how this lamp is meant to run. Budget the labor for the ballast removal and rewire at each fixture before you commit to a quantity.

No. The S8537 has a G24d 2-pin base, which only seats in a 2-pin socket. A 4-pin CFL uses a G24q socket with a different pin and keying arrangement, so this lamp will not drop into it. For 4-pin fixtures you need a 4-pin PL LED instead.

It is rated vertical. The lamp is built for vertical burn position, so use it in downlights and other fixtures where the socket points the lamp up or down rather than in a horizontal sconce or wall-mount can.

950 lumens at 9 watts, in 3500K. That is a neutral white, between the warm 2700K to 3000K look of residential lamps and the cooler 4000K found in offices and back-of-house areas. If your building is already standardized on 3500K corridors or lobbies, this matches; mixing it beside 4000K lamps in the same run of cans will read noticeably different.

50,000 average rated hours. For a property manager running corridor or stairwell fixtures long hours a day, that is a relamp interval measured in years rather than the annual or biannual cycle typical of the 2-pin CFLs these replace, which is usually where the labor savings on a Type B conversion come from.

120 degree beam angle, which is a wide flood spread rather than a directed beam. In a recessed can or a wall-pack style fixture that gives even wash across the floor, but it is not the lamp to use where you want tight accent throw.

Treat it as a straight on/off lamp. The S8537 is specified as a 9W 3500K Type B ballast bypass PL with a 120 degree beam, and no dimming performance is part of that spec, so wire it to an unswitched-dimmer circuit rather than expecting it to track an existing dimmer.