Fluorescent Graphiclite Color Viewing Lamps, 20 inches. 6 for $10 Brand new, never used. See more info here:
https://www.gtilite.com/graphic-arts-products/
GTI Graphiclite 100 lamps are manufactured with a unique blend of fluorescent phosphors that is unequaled by any other 5000 Kelvin lamp in the industry. GTI lamps produce a true full spectrum white light which renders colors with the highest degree of accuracy and efficiency.