Looking to upgrade those old-fashioned bayonet base bulbs? These BA15D (or B15) LED bulbs are a super efficient replacement. You can get them as a single piece or in a handy 10-pack. They're brand new and come properly packaged. The big deal here is they're only 5 watts but put out a really bright 400 to 799 lumens – that's a lot of light for very little power! You get to choose your color temperature: go for a cozy Warm White (3000K) or a crisp, daylight-like Cool White (6000K). And yes, they're dimmable if you have a compatible dimmer switch. The bulb shape is a \corn cob\ style (Corn Bulb) covered with lots of tiny 2835SMD LEDs. They work on a wide voltage range from 110V to 220V, so they're great for homes, workshops, or even international use. Expect a super long life of 25,000 to 30,000 hours – that's years of use! They're unbranded but well-made, and come from China. Fast fulfillment means they ship out quickly. Ditch the old incandescent or halogen bulbs, save on your energy bill, and get better light. Perfect for lamps, ceiling fixtures, or any fixture with a bayonet socket. Grab yours now!