SATCO Lighting S21337 8W BT15 LED, White, Medium Base, 90 CRI, 2700K, 120V

Warm. The S21337 is 2700K, the warm yellow-white tone that matches classic incandescent lighting. If you are relamping a building where the existing bulbs are traditional incandescent or warm-white LED, 2700K is the match. Anything at 3000K or above will read visibly cooler and whiter next to it, which is what property managers notice when two fixtures in the same hallway get lamped from different boxes.

The S21337 is a 90 CRI lamp, which puts it in the high color rendering tier used where how things look under the light matters: guest rooms, dining areas, retail displays, healthcare spaces. Standard general-service LEDs often sit around 80 CRI. At 90, skin tones, wood finishes and fabrics render closer to how they look under daylight. If you are standardizing a facility, spec the CRI as well as the color temperature, since a 2700K 80 CRI bulb next to a 2700K 90 CRI bulb will not look the same.

White only. The S21337 is a white finish BT15, meaning a diffused envelope that softens the LED emitters rather than showing them. If you want visible filament styling in an exposed socket, that is a different lamp; the white finish is what you want where the bulb sits behind a shade, in a diffuser, or in any fixture where a bare bright point would glare.

Order by the Satco part number S21337. That single number pins down all of it: 8 watt, BT15 shape, white finish, medium base, 90 CRI, 2700K, 120 volt. Relamping goes wrong when someone matches on wattage and shape alone and ends up with a 3000K or 80 CRI lamp in the same corridor, so keep the part number on the stockroom label rather than a description.

At 8 watts, the S21337 draws a fraction of what a decorative incandescent of the same shape pulled from the wall. LED bulbs produce their light at far lower wattage than incandescent, so wattage is not the comparison to make: match on the socket (medium base), the voltage (120V) and the color, and treat the 8 watts purely as the load on the circuit when you are counting bulbs on a dimmer or a branch.