This was a pretty good offer: https://www.hotukdeals.com/deals/philips-hue-colour-and-white-ambiance-starter-kit-3-x-65-w-gu10-7999-amazon-3105049 https://www.hotukdeals.com/deals/philips-hue-gu10-starter-kit-with-3-colour-led-bulbs-8999-at-amazon-2737658 £79.99 - 89.99. It does come up every few months so it's definitely worth waiting for.
Thanks for the info. So by my calculations.... A standard halogen GU10 bulb is 53mm Hue colour GU10 is 72mm Difference = 19mm bigger My existing downlighter external size 100mm These ones 130mm Difference = 30mm Hopefully internal size should also be about 30mm bigger. I think I will just order these and see, but I'm waiting for a good offer on 3 Hue GU10 colour bulbs. Anybody know what the worst and best prices to expect on Hue GU10 colour bulbs?
I can't personally see any point in fitting GU10 fittings nowadays. You can fit LED replacements to them of course but there are many other types nowadays which are not to bulky and have similar properties.
IKEA Tradfri GU10s fit in standard fittings too, they're not much larger than standard bulbs. However, this does have a depth of 130mm so it should fit the 72mm Hue bulb easily - but that's just judging by the specs listed.