SATCO Lighting S21821 4W B11 LED, Clear, Candelabra Base, 3000K, 350 Lumens, 120V, 4-Pack

The S21821 draws 4 watts and produces 350 lumens. That output is in the range of a 40 watt incandescent candelabra lamp, so it is a like for like swap in most decorative fixtures while cutting the load on the circuit substantially, which matters when a chandelier carries a dozen sockets.

3000K, which is a warm white with a soft yellow cast. It reads warmer than a 3500K or 4000K neutral lamp and is the usual choice for lobbies, dining areas, corridor sconces and residential chandeliers. If you are matching existing lamps in a building, check that the others are also 3000K, mixing color temperatures on one fixture is obvious.

It ships as a 4-pack under a single part number, S21821. Worth knowing if you are ordering for a fixture count, a six-arm chandelier needs two packs, and a property doing a full relamp should order in multiples of four rather than per socket.

The lamp is a clear B11, so the light source inside is visible through the glass rather than hidden behind a frosted coating. Clear is what you want in open chandeliers, candelabra sconces and exposed decorative fixtures where the lamp is part of the look. If the bulb sits behind a shade or you are getting glare complaints, a frosted or satin version is the better pick.

B11 is a bulged candle shape about 11 eighths of an inch across at its widest, with a rounded body that tapers to a point. C and CA shapes are the narrower straight-sided and bent-tip candle profiles. All three commonly share the candelabra base, so they are electrically interchangeable, the difference is purely how the lamp looks in an open fixture and whether it clears a small shade or a chimney sleeve.