SATCO Lighting S39719 25W T5 LED, Miniature bi-pin Base, 5000K, 50000 Avg Rated Hours, 3400 Lumens, Type B, Ballast Bypass

Yes. The S39719 is a Type B ballast bypass lamp, so it runs on line voltage directly and the existing fluorescent ballast has to be removed or disconnected. It accepts 120-277 volt line voltage and can be wired single ended or double ended, so it works with either sockets rewired to one end or the common double ended arrangement.

It uses a miniature bi-pin base, which is the standard base on T5 linear fluorescent lamps, so it drops into existing T5 lampholders. What does change is the wiring: the ballast must be bypassed because this is a Type B lamp, not a plug-and-play replacement.

The S39719 supports both, so you can pick whichever suits the fixture. Double ended puts line on one end and neutral on the other, which is often the quicker conversion in an existing T5 housing. Single ended brings both conductors to one lampholder and leaves the other end as a support only. Either way the ballast comes out first, since this is a Type B lamp.

At 5000K the S39719 reads as a crisp daylight white, which is what most buyers specify for warehouses, parking structures, shops, and back-of-house areas. For offices and hospitality spaces where a warmer, softer look is wanted, you would normally spec a 3500K or 4000K lamp instead. Mixing 5000K with existing 3500K or 4000K tubes in the same room will be visibly obvious.

The S39719 draws 25 watts and delivers 3400 lumens, which puts it in the output range of a high output T5 fluorescent tube while pulling less power. For a facility doing a full relamp, that lumen figure is what you use to confirm you are not losing foot-candles at the floor.

Yes. The lamp is rated 120-277 volt, so the same part number works on 120V tenant circuits and on 277V commercial lighting branch circuits. That lets a procurement group standardize on a single SKU across mixed-voltage buildings.

Rated at 50,000 average hours. For a property or MRO group running fixtures roughly 12 hours a day, that is on the order of a decade of service, which is the main reason facilities move off fluorescent tubes that need replacing every couple of years.

Order Satco S39719. It is supplied with a frost lens, which diffuses the diodes so you do not see individual LED points through the tube.