Replacement for 142 NATIONAL Halogen - T3 Shape G4 Base 20W 6V with Clear Finish

Designed as a direct replacement for the 142 from NATIONAL, this halogen lamp matches the original specifications to ensure proper fit and performance. Rated at 20W, 6V, T3 form factor, it installs into any fixture that uses a G4 bi-pin base. The 280-lumen output ensures strong illumination for demanding applications.

This lamp provides the stable, continuous-spectrum output that analytical instruments like spectrophotometers and photometers require for accurate, repeatable measurements. Its halogen gas fill keeps the tungsten filament operating cleanly, preventing envelope darkening that would introduce drift in optical readings. It helps maintain consistent results across calibration cycles.

Key Features & Benefits

• 280 lumens of rated output for strong, consistent illumination.
• G4 bi-pin base for secure installation in compatible fixtures.
• T3 form factor with clear finish for controlled light output.
• Operates at 20W, 6V to match standard low-voltage circuits.

Product Specifications

• Wattage: 20W
• Voltage: 6V
• Base Type: G4 2-PIN 4MM CENTER/CENTER
• Bulb Shape: T3
• Finish: Clear Finish
• Lumens: 280
• Condition: Brand New

Common Applications

This halogen lamp is commonly used in:

• Spectrophotometer and UV-Vis analyzer light sources
• Chromatography detector illumination modules
• Automated clinical chemistry analyzers
• Microscope and optical measurement instruments
• Scientific research and analytical equipment

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.