Experience hassle-free energy savings simply by replacing your currently linear fluorescent tube with the Philips InstantFit 24-Watt 4 ft. T5 linear LED light bulb (LED T5 24-Watt/850). It is the easiest way to replace a linear fluorescent light bulb with an LED solution. Philips InstantFit is a true plug 'n play solution that allows you to leave your existing ballast in your system, while upgrading to the energy savings of LED technology. This product is compatible with most instant start ballasts and requires no modifications to your existing fixture, which means no rewiring is necessary with this InstantFit design. They are ideal for use in general lighting applications where fluorescent lighting is used and are perfect for applications with frequent "on/off" switching cycles. In residential settings, this light bulb is perfect for laundry rooms, kitchens, garages and basements and in commercial settings in retail offices, parking garages or industrial spaces. Unlike fluorescent bulbs, Philips InstantFit linear T5 LED light bulbs contain no mercury, offering a safe and sustainable, solution, while operating well in cold temperatures.