Replacement Light Bulb for Batteries and Light Bulbs M400/U/BT28 general lighting - 400W 4000K E39 Base

Replacement for the Batteries and Light Bulbs M400/U/BT28 mercury vapor lamp provides the specified 400 watts and 36000 lumens output for general lighting tasks.

Key Features & Benefits

• Delivers 36000 lumens at 4000K color temperature
• Operates at 400 watts with 20000 hour rated life
• ED28 shape with clear finish and CRI of 65

Product Specifications

• Watts: 400
• Color Temp: 4000
• Lumens: 36000
• Life: 20000
• Base: E39 MOGUL SCREW BASE 39MM DIAMETER (E40)

Replacement Compatibility

Direct replacement for M400/U/BT28 and similar HID fixtures in commercial industrial and outdoor systems.

Discover the Perfect Replacement

Confirm your fixture requirements and select this lamp to maintain consistent lighting performance in your current setup.

During the checkout process, you can choose from expedited services such as overnight delivery to standard ground shipping. We aim to ensure your order is delivered promptly and reliably, wherever you are.

All returns must be made within 30 days of purchase with the invoice. (After 30 days, Interlight credit only, Minimum 25% restocking fee, no returns after 60 days, special items order just for you are not returnable.)

At Interlight, your satisfaction is our priority. We offer a 30-day money-back guarantee on eligible products, provided they are returned in resalable condition with the original invoice.