Replacement Mercury Vapor Bulb for Iwasaki 250WSB/E28 MOGUL - 120V 250W E39 Base

Replacement for Iwasaki 250WSB/E28 MOGUL mercury vapor bulb in BT28 form factor rated at 250W and 120V. This direct fit part restores original lighting output in multi-application fixtures using the listed electrical parameters. The bulb delivers consistent performance across extended operating periods thanks to its robust construction and proven mercury vapor technology.

Key Features & Benefits

• Operates at 120 volts with 2.083 amps draw
• Delivers 10000 hours rated life
• BT28 shape with white coated bulb finish

Product Specifications

• Volts: 120
• Watts: 250
• Base: E39 MOGUL SCREW BASE 39MM DIAMETER (E40)
• Shape: BT28
• Life: 10000
• Bulb Finish: WHITE/COATED
• AMPS: 2.083
• Replaces OEM: 250WSB/E28 MOGUL

Replacement Compatibility

Compatible with fixtures designed for Iwasaki 250WSB/E28 MOGUL mercury vapor bulbs in 120V systems requiring E39 base and BT28 shape. The white coated finish provides diffused illumination suitable for general lighting tasks where uniform distribution matters. Maintenance staff appreciate the straightforward swap procedure that minimizes downtime during scheduled relamping cycles. Electrical characteristics remain identical to the original component ensuring no adjustments to ballast or ignitor settings are necessary. Long term reliability stems from quality materials selected to withstand repeated thermal cycling inside enclosed luminaires. The mercury vapor arc tube is engineered for consistent starting even after cool-down periods, supporting applications that require frequent on-off cycles without premature failure. Facility managers report reduced inventory needs because this single SKU covers multiple fixture models sharing the same electrical and mechanical requirements. When installed correctly the bulb maintains its specified light output for the full ten thousand hour life, delivering predictable operating costs and fewer service interruptions.

Discover the Perfect Replacement

Browse the full selection of matching replacement bulbs by voltage wattage and base type to complete your order today. Each unit undergoes strict quality inspection prior to packaging so customers receive defect free product ready for immediate service. Proper handling includes avoiding skin oils on the glass surface and confirming correct orientation during insertion into the mogul socket. This approach supports consistent lumen maintenance and color stability across the entire service interval. Users in warehouses, retail spaces, and outdoor security installations rely on the proven durability of mercury vapor technology when LED retrofits are not yet feasible. Stocking this direct replacement ensures quick turnaround on emergency repairs while preserving the original fixture design and photometric performance.

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.