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The Gem-A line of products also features a highly recommended Refractometer Lamp. Although virtually any light source can be shone through the rear light portal of the refractometer, this well-though-out lamp is designed for the task, with its sodium wavelength light, simple battery operation, easy On/Off switch, and adjustable feet.
Battery: A single 3 Volt Lithium, 20mm coin type (CR2032 or equivalent), 70 hour life at continued use
Light: No bulb - rather, a Light Emitting Diode (LED) at wavelength of 590 nm
This item typically ships within 1 business day.
The refractometer lamp is the only one I could find that was competitively priced and delivered promptly. It does the job overall, but I have to place the lamp on a box so that it could reach the refractometer (from GIA), which is a little annoying. Also, the light is not super bright, so the reading scale is not lit up brightly. Overall though it’s a decent lamp that does the job. Unknown on Aug 9th 2019
Light works great. Matthew on May 11th 2019