how to identify a 78 mm R7s halogen lamp for a light fitting
match the fitting's lamp specification before arranging a change. the pack contains two 78 mm R7s/J78 linear halogen lamps, each 150 W at 220-240 V; the second can be kept as a spare.
the holder, fitting and protective glass are not supplied. this guide covers selection and safe-access checks, not releasing the old lamp or seating it between the contacts.
- repair type
- owner care
- difficulty
- easy
scope: the fitting must accept the length and permit 150 W halogen use. disconnect and cool, use safe access and do not bend contacts. restore intact protective glass before power; unsafe height or electrical-enclosure access needs service.
steps
- check the cold fitting's label
disconnect power as the fitting instructions direct and let it cool fully. compare an already-accessible marking and the fitting label for R7s, 78 mm, 150 W and 220-240 V. check the complete fitting model in the compatibility checker.
- check access and condition
look for damaged protective glass or visible contact damage without disturbing the holder. unsafe height or access through an electrical enclosure needs service. leave a stuck lamp in place.
- match the length and permitted wattage
the fitting must accept the 78 mm format and permit 150 W halogen use. a longer R7s lamp or a higher wattage is not a substitute. do not bend contacts or force the glass to make a lamp fit.
- get the holder-release instructions
obtain the exact fitting's removal and seating instructions or use a qualified repairer. clean gloves or a cloth protect halogen glass during permitted handling. intact protective glass must be securely restored before power returns. repeated failure, poor seating or continued darkness needs the fitting checked.
diy warning
working on appliances can involve mains electricity, water and moving parts. always disconnect power and water before you start. in Australia, gas work must be done by a licensed gasfitter, and fixed (hard-wired) electrical work by a licensed electrician. everything on this site is guidance only, and any repair you carry out is at your own risk. we are not responsible for any damage or injury caused by attempting a repair. if you are not confident, please use a qualified technician.
think you can improve this guide? help us
