Mercury light source, 20W low pressure discharge lamps for spectral work. Delivers approximately 100 lux at 20 cm with prominent lines at 434.7, 546.0, 577.0, and 579.1 nm as well as many faint lines.
Push-button, bright light, reusable penlight - Activated by depressing, new heavy duty switch - Striking metallic black finish or high gloss white - Two inchAAAinch batteries included - Measures 6inchx1/2inch, black
Ultra Light* Pupil Gauge is a quality, rugged, yet affordable penlight. It features a pocket clip and push button endcap switch. Superior brightness. Approximately 5 1/4inch in length. Uses two AAA batteries, black.
Ultra Light* pupil gauge is a quality, rugged, yet affordable penlight. It features a pocket clip and push button endcap switch. Superior brightness. Approximately 5 1/4inch in length. Uses two AAA batteries, included), red
Ultra Light* pupil gauge is a quality, rugged, yet affordable penlight. It features a pocket clip and push button endcap switch. Superior brightness. Approximately 5 1/4inch in length. Uses two AAA batteries, included), blue