Instant retrofit, instant savings Philips LED high bay lamps are a direct replacement for 250W to 400W metal halide lamps which will deliver substantial energy savings. Available in both plug-and-play (UL Type A) and MainsFit (UL Type B) options, Philips LED HighBays delivers bright, clean light for a fraction of the energy used by conventional HID. Energy savings of <gt/>50%;Direct lamp replacement without a ballast or fixture change (UL Type A);Operates on 400W, 320W and 250W ballasts