Replacement Light Bulb for Bausch & Lomb 31-77-25 Optical Instruments - 120V 15W T7 E17

Replacement for the Bausch & Lomb 31-77-25 optical instrument bulb begins with a precise T7 incandescent design that meets original equipment standards for voltage, wattage, and base configuration. This incandescent bulb operates reliably at 120 volts drawing only 0.125 amps to produce a steady 1080 lumens of clear light output. Its 1500-hour rated life supports extended use in laboratory and inspection environments where consistent illumination prevents workflow interruptions. The intermediate E17 screw base installs directly into existing sockets without adapters, maintaining the original fixture integrity and safety compliance.

Key Features & Benefits

• Operates at 120 volts and 15 watts for consistent light output
• Produces 1080 lumens with clear finish
• T7 shape and E17 intermediate screw base
• Rated for 1500 hours of operation

Product Specifications

• Volts: 120
• Watts: 15
• Base: E17 INTERMEDIATE SCREW 17MM DIAMETER
• Lumens: 1080
• Shape: T7
• Life: 1500
• Bulb Finish: CLEAR
• AMPS: 0.125
• Replaces OEM: 31-77-25

Replacement Compatibility

Compatible with Bausch & Lomb optical instruments and multi-application fixtures requiring T7 120V 15W incandescent bulbs with E17 base. Users in research labs, medical facilities, and industrial inspection stations rely on this direct substitute to keep precision equipment functioning at peak performance levels without costly downtime or modifications to existing housings. The clear glass envelope delivers unobstructed light transmission that matches the spectral qualities needed for detailed visual tasks.

Discover the Perfect Replacement

Confirm voltage, wattage, and base type against your equipment requirements before ordering this direct replacement bulb. Proper handling during installation extends service life and preserves the optical clarity essential for accurate readings and observations. Stocking a spare ensures immediate restoration of full functionality whenever an original bulb reaches end of life, supporting continuous operation across demanding professional settings where reliable illumination directly impacts productivity and measurement precision. Additional considerations include verifying socket compatibility in older instruments to avoid any mismatch during swaps. Regular inspection of the bulb after extended sessions helps identify early signs of wear before complete failure occurs. This approach minimizes unexpected halts in critical examination processes and maintains workflow efficiency in high-demand environments. Professionals appreciate the stable output that avoids flickering issues common in lesser substitutes, ensuring uninterrupted focus on intricate details during prolonged use periods.

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.