6V 20W Halogen Bulb for Microscopes : Amazon.co.uk: Lighting
Narva 55912 HLL 6v 20w G4 Long life Lamp | MedLamps UK
Carl Zeiss™ Replacement Bulbs for Microscopes and Fiber Optic Power Supplies 6V 20w Halogen Bulb Carl Zeiss™ Replacement Bulbs for Microscopes and Fiber Optic Power Supplies | Fisher Scientific
Pin Base Lamp – Halogen 6V / 20W – G4 – HLX – Osram HLX 64250 (ESB) – Van Eck Video Services