4ft LED Bulbs 5000k can produce up to 2500 lumens, which can brighten a standard ceiling height. T8, T10, and T12 fluorescent tubes can all be replaced with these bulbs. They come with a single-ended base. These bulbs are long-lasting and cost-effective. They have a more than 120-degree beam angle. For the best quality, 4ft LED Bulbs 5000k for your workplace, look no further than LEDMyplace.