Diagnostic Instrument Bulbs & Lamps

Diagnostic instrument bulbs are the replacement light source inside otoscopes, ophthalmoscopes, and specula illuminators - the halogen or HPX bulb that provides the illumination clinicians rely on for an accurate exam. Because these bulbs are a wear item, they need periodic replacement to maintain proper brightness and color temperature for diagnostic accuracy.

Medicaleshop carries genuine and compatible replacement bulbs from Welch Allyn, McKesson, ADC, and Bulbtronics, sized to fit specific handle and head models - along with a hand-held UV-A lamp from Grafco for Wood's lamp-style skin examinations.

How do I know which replacement bulb fits my instrument?

Match the voltage and model number printed on your instrument handle or head (e.g., 2.5V, 3.5V, HPX) to the bulb listing - bulbs are not universally interchangeable between brands or instrument generations.

How often should diagnostic instrument bulbs be replaced?

Replace a bulb as soon as it dims, flickers, or fails - most halogen bulbs have a rated lifespan but degrade in brightness gradually before full failure, which can affect exam accuracy.