The RAB Lighting HID-135-V-EX39-840-BYP-HB is a high-quality LED lamp designed for use in high bay and other suitable light fixtures. It operates within a temperature range of -20°C to 45°C (-4°F to 113°F) and is not dimmable. This energy-efficient lamp has a lifespan of five years and comes with a warranty. It requires professional installation by a qualified electrician and should not be used with dimmers or in emergency exits. The lamp's installation involves removing existing ballasts, capacitors, and ignitors and connecting the lamp directly to the alternating current wires.