SATCO Lighting S21851 4W CA10 LED, Frosted, Medium Base, 2700K, 350 Lumens, 120V, 2- Pack

350 lumens at 4 watts is in the range of a typical 40 watt incandescent candle lamp, which is what most chandeliers and sconces were originally lamped with. In a multi-arm fixture the combined output is what you notice, so a five or six arm chandelier lit with these reads close to the original. The frosted finish diffuses the filament so you get a softer glow rather than a visible point source, which matters in exposed-bulb fixtures where the lamp is seen directly.

2700K is warm white, the same yellow-toned light an incandescent lamp gives. For property managers relamping common-area sconces or hospitality guest rooms, this is the value to standardize on if the existing lamps are incandescent or halogen, because mixing 2700K with a 3000K or 4000K lamp in the same fixture or hallway shows up immediately as a color mismatch.

S21851 ships as a 2-pack. A typical chandelier takes five or six lamps, so plan on three packs for a six-light fixture. MRO and multi-family buyers relamping a whole floor should multiply out by fixture count before ordering, since the pack quantity is two rather than a single lamp.

It runs on 120 volt line power directly, no transformer or driver needed. Wire it to a standard residential or commercial branch circuit socket. If your fixture is a low-voltage system fed by a 12V transformer, this lamp is not the right part.

Satco Lighting S21851. The full spec on that number is 4 watt CA10 LED, frosted, medium base, 2700K, 350 lumens, 120 volt, sold as a 2-pack. Distributors ordering a replacement should quote S21851 directly, since Satco's CA10 family runs across multiple color temperatures and base types under adjacent numbers.

Frost is the only finish this lamp comes in, and it diffuses the light so the internal emitters are not seen as hard bright points through the glass. That is what you want in an open chandelier, wall sconce, or bath bar where the lamp is in the sight line. If you specifically want the decorative visible-filament look, a clear lamp is the wrong call here since this one is frosted only.