Convert your existing fluorescent fixture to LED technology with Feit Electric T848/4CCT/LED/2 4ft. T8 LED Plug and Play lamps. Adjustable White bulbs allow you to set a light color during installation to match your current lighting or set the perfect mood for your space. Get instant on to full brightness even in sub-zero temperatures with relatively cool running performance. Choose a dependable flicker-free bulb for residential or commercial applications. No replacement/removal of the ballast or installation of LED driver is required.