Light Efficient Design LED-8242M40D-HV LED High Bay Retrofit Lamp - Dimmable - EX39 - 270W - 4000K - 34,415 Lumens - 277-480V

Light Efficient Design’s LED-8242M40D-HV is a high bay retrofit lamp designed to replace a 1,000-watt HID fixture with a 270-watt LED alternative. Built for efficiency and longevity, this Mogul EX39 base lamp operates on 277–480 V and delivers approximately 34,415 lumens at a 4000 K color temperature. It is designed for use in enclosed fixtures and damp locations, and includes advanced active cooling to help maintain performance over its rated 50,000 hours of life. The unit is continuously dimmable on a 0–10 V control scheme down to 20%, enabling flexible light levels for varying occupancy or task requirements.

Key construction and features include a ballast-bypass (Type B) design, which supports straightforward retrofits in compatible fixtures, and built-in 6 kA surge protection to withstand power transients. The lamp’s physical footprint is compact for a high-output retrofit, with dimensions approximately 10.3 inches in diameter and 12.5 inches in height, making it suitable for retrofit projects where space is a consideration. Its operating temperature range spans -40°F to 122°F, allowing operation in challenging environments common to warehouses and industrial facilities.

This lamp is best suited for upgrading existing high-bay installations where HID performance is desired but energy efficiency and reduced maintenance are priorities. Be sure to verify that your fixture supports EX39/Mogul base and ballast-bypass wiring, and confirm driver and dimming compatibility with your control system. The product is listed with a 50,000-hour rated life and 4000 K color temperature, offering a balance between color fidelity and efficiency for industrial settings.

Features:

• Type B ballast bypass operation
• Mogul EX39 base
• 0-10V dimmable down to 20%
• Advanced active cooling fan
• Enclosed fixture rated
• Damp location rated
• 6kA surge protection