OSRAM Smart+ LED, ZigBee GU5.3 Reflector, 12V, warm white to daylight (2700K - 6500K), dimmable, Directly compatible with Echo Plus and Echo Show (2. Gen.), Compatible with Philips Hue Bridge : Amazon.co.uk:
Philips GU5.3 8W 621lm Reflector Warm white LED Light bulb | DIY at B&Q
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Quick look: The new MR16 spots with GU5.3 socket - Hueblog.com
Neue MR16 Spots von Philips Hue aufgetaucht
MR16 GU5.3 LED Spot 12V 5 Watt
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Philips Warmglow GU5,3 5 W LED-reflektorpære 36° | Lampegiganten.no