Instant retrofit, instant savings Energy savings of <gt/>50%;Direct lamp replacement without a ballast or fixture change (UL Type A);Operates on 400W, 320W and 250W ballasts Philips LED high bay lamps are a direct replacement for 250W to 400W metal halide lamps which will deliver substantial energy savings. Philips LED HighBays delivers bright, clean light for a fraction of the energy used by conventional HID. Standard EX39 base to replace metal halide lamps;Works on probe and pulse start ballasts (Type A only);Available with 1000 lumens of "up-light" to fully illuminate fixtures (Type A only);Upto 5-year limited warranty;Two beam options, wide or narrow available;Surge 6KV Warehouses, Industrial & Retail;Gymnasiums