SATCO Lighting S21371 4W T6.5 LED, Clear, Intermediate Base, 4000K, 400 Lumens, 120V

4000K is neutral or cool white, a clean white without the yellow cast of a 2700K to 3000K warm lamp and without the blue of a 5000K daylight lamp. For a property manager standardizing common areas, laundry rooms, stairwells or back-of-house fixtures, 4000K reads as crisp and utilitarian. If the rest of the building runs warm white, this lamp will look visibly cooler beside it, so match color temperature across an opening or a room rather than mixing.

400 lumens on 4 watts, at 120 volts. That's a real output figure, not an equivalency claim, so size the fixture off the 400 lumens. For MRO buyers tracking connected load across a building, four watts per socket is the number to run the count on.

It runs directly on 120 volt line power. No external driver, transformer or ballast, so it drops straight into a standard line-voltage intermediate socket. It is not a low-voltage lamp, so don't put it on a 12V or 24V circuit.

Clear, the only finish this lamp is offered in. A clear envelope leaves the LED filament or chip visible and throws a sharper, more sparkling light, which is what you want in an open decorative fixture, a chandelier or an exposed socket where the bulb is part of the look. In a bare socket over a work area it will show more glare than a frosted lamp would.

T6.5 is a tubular lamp shape, the narrow straight-sided envelope common to appliance and sign lamps rather than a bulged A or globe form. Paired with the intermediate base it suits tight fixtures, exit and sign housings, and appliance sockets where an A-shape lamp would foul the enclosure. Measure your existing lamp if the housing is close, since a tubular envelope is what fits where a wider shape will not.

Order it by manufacturer part number S21371 from Satco Lighting. There's one configuration: 4 watt, T6.5, clear, intermediate base, 4000K, 400 lumens, 120 volt. No finish, wattage or color temperature choices to specify, so the part number alone pins it down for a distributor or a purchasing line item.