We tested a few bulbs and they work (see photo).
Eschenbach Lupe 4x Magnifying Glasses Low Vision Close Up View W/ Case + Manual
Vintage Eschenbach Mobilux 4x 16D 35mm Illuminated Round Magnifying Glass NOS
ESCHENBACH Hand-held 4X Magnifying Glass mobilux LED
Eschenbach 4x Magnifying Glass with LED Light
ESCHENBACH Hand-held 4X Magnifying Glass mobilux LED (D4)
Flashlight magnifier Eschenbach easyPOCKET 4X/16D
