Replacement Bulb for Sylvania HSW 400W | Mercury Vapor Blacklight | E40 Base

Create powerful UV effects for large venues with our replacement for Sylvania HSW 400W Mercury Blacklight. This high-intensity 400-watt discharge lamp emits long-wave ultraviolet (UV-A) radiation, designed to make fluorescent materials glow vividly over long distances.

Featuring a large E40 Mogul base and an outer black glass envelope, this bulb filters out most visible light while transmitting UV energy. It requires a 400W mercury vapor ballast to operate and is perfect for stage effects, non-destructive testing, and special events.

Key Features & Benefits

• High Intensity UV-A: 400 watts of power projects blacklight effects over large stages, dance floors, or industrial inspection areas.
• Black Glass Filter: Integral "Wood's Glass" envelope blocks visible light, eliminating the need for external filters on the fixture.
• Long Throw: Ideal for floodlighting large areas or creating dramatic effects in theaters and clubs.
• Industrial Inspection: Used for magnetic particle inspection and leak detection where high UV intensity is required.
• Standard E40 Base: Fits standard European/International mogul sockets (check compatibility with E39 US sockets).

Product Specifications

• Product Type: Replacement Blacklight Mercury Vapor Bulb
• Replaces OEM Part #: HSW 400W (Sylvania)
• Wattage: 400 Watts
• Base Type: Mogul Screw (E40)
• Light Output: UV-A Blacklight
• Requires Ballast: Yes (400W Mercury)
• Condition: Brand New

Common Applications

This powerful blacklight is used for:

• Theatrical Stage Lighting
• Nightclub and Event Special Effects
• Industrial Non-Destructive Testing
• Mineralogy and Geology Displays

Power up your blacklight effects. Order your Replacement 400W Mercury UV Bulb today!

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.