SATCO Lighting S21863 5.5W T10 LED, Clear, Medium Base, 5000K, 450 Lumens, 120V, 2-Pack

The S21863 is a dimmable lamp, so it will work on a dimmed circuit rather than only full-on. Older magnetic/incandescent dimmers were built for a much larger wattage load than a 5.5 watt LED draws, so if you are running only one or two lamps on a circuit expect better low-end behavior from an LED-rated dimmer.

At 450 lumens, the S21863 lands in the 40 watt incandescent range, which is what most T10 tubular bulbs in sconces and sign fixtures originally used. You are getting that light level at 5.5 watts of draw, so a fixture or circuit loaded with these runs a fraction of the original wattage.

5000K is daylight white, a crisp blue-white rather than the yellow cast of an incandescent. In corridors, laundry rooms, stairwells, garages, and work areas it reads clean and bright. For guest rooms, lobbies, and dining spaces where you are matching existing incandescent-look fixtures, a 2700K or 3000K lamp is the better match, because mixing 5000K with warm lamps on the same run is immediately visible.

Yes. The S21863 carries a 90+ CRI rating, which is the threshold specifiers ask for on retail, healthcare, and display lighting where color rendering matters. Paired with the 5000K daylight color temperature, it renders whites and fabrics accurately rather than washing them yellow.

The S21863 ships as a 2-pack, so one order unit covers a two-lamp sconce or a pair of single-socket fixtures. For a property manager relamping a corridor, count your sockets and divide by two when you build the order.

Only if those lamps are also 5000K. Dropping a 5000K daylight lamp beside a 2700K warm lamp in the same multi-socket fixture gives you an obvious color mismatch. When standardizing a building, relamp the whole fixture, and ideally the whole run, at one color temperature. Keeping to a single part number also holds the 450 lumen output and 90+ CRI consistent socket to socket.

The S21863 is clear glass, so the lamp is meant to be seen. In an open or glass-front fixture that means visible sparkle and sharper shadows; if you are after diffuse, even light with no glare from an exposed socket, a frosted lamp is the better choice.