Philips InstantFit 48 in. T8 linear LED light bulb is the easiest way to replace linear fluorescent light bulbs with an LED solution. An instant start ballast is required for use, with no modifications to the existing fixture that it houses and no rewiring necessary with this Instant Fit design. Using only 17-Watt of energy, it is a 55% savings compared to a 32-Watt linear fluorescent bulb. 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 like laundry rooms, kitchens, garages, as well as commercial use in offices and hospitals. Unlike fluorescent bulbs, Philips InstantFit linear T8 LED light bulbs offer a safe and sustainable, solution with durable glass-free design, while operating well in cold temperatures and without containing any mercury.