SATCO Lighting S11478 5W B11, Dusk to Dawn LED, 5000K, Candelabra Base, 120V, 90 CRI, With Photocell

The S11478 has the photocell built into the lamp. It senses ambient light and switches on at dusk, off at dawn, so no separate photo control is needed at the fixture. That does mean the switch feeding it has to stay on, and the sensor needs to see darkness, so a fully enclosed opaque fixture or a lamp sitting under another light source can confuse it.

No. The S11478 is non-dimmable, so it should be wired to a plain on/off circuit at 120V, 60Hz. Put it on a dimmer and you risk flicker, buzz, or shortened life. It is also self-switching by photocell, so a dimmer serves no purpose here anyway.

It is rated for indoor or outdoor use in damp locations, which covers a covered porch, a soffit can, or an enclosed coach lantern where the lamp is shielded from direct rain. A damp rating is not a wet rating, so do not use it in an open fixture exposed to driving rain or direct water contact.

It uses a candelabra base, the small screw base common in chandeliers, sconces, and coach lanterns, in a B11 torpedo shape with a glass body and LED filament. If your existing bulbs are B11 candelabra, this drops straight in.

5000K is daylight white, a crisp blue-white rather than the warm yellow of an incandescent candle lamp. It reads as security lighting, which suits parking areas, stairwells, entries, and multi-family exteriors. For a dining chandelier or a hospitality lobby where you want the warm candle look, this is the wrong color temperature. The color temperature is fixed, not selectable.

Burning position is universal, so the S11478 can be mounted base up, base down, or horizontal. That matters with candelabra lamps because sconces and lanterns often run tip down. Just make sure the photocell still has a view of ambient light in whatever orientation you choose.

Yes, it is listed as Title 24 compliant and FCC compliant. It is not DLC listed, so if your utility rebate program requires a DLC qualified product, this one will not qualify.

Beam spread is 280 degrees, close to omnidirectional, which is what you want in an open lantern or a chandelier where the lamp is visible from all sides. It is not a directional lamp, so it will not concentrate light downward the way a reflector would.

The S11478 delivers 90 CRI, which renders colors close to natural daylight. On an exterior it helps with security camera footage and identifying vehicle or clothing color; indoors it keeps finishes and paint looking true. Most basic LED candelabra lamps sit at 80 CRI, so 90 is a step up.

No. It is a single-output lamp with no three-way function, so in a three-way socket it will run at one level only. It is also non-dimmable, so output is fixed at 500 lumens whenever the photocell calls for light.