My R63s were burning 40w. I bought them to replace R63 burning 60w some years back. I was looking for a direct replacement that was the same size. Having looked around for several months I came across these. I bought enough to get free postage (14/15). If anything slightly brighter than my old 60w and a perfect fit.Very pleased so far. Must have been installed for 6 months.
Chris - Chichester
fed up of replacing bulbs,purchased 3 integral led lamps months ago excellent buy still going strong !