The new updated Sylvania RefLED Superia ES50 V3 LED GU10 spotlight light bulb now only uses 5.5W of electricity but still gives the equivalent light output of the traditional 50W Halogen.It fits perfectly into standard GU10 fitting, making it a brilliant eco-friendly (and money-saving) replacement and is ideal for use in offices, hospitality, retail, education and residential environments.Super-long life and a warm white colour mean you can change your power-hungry halogens, but only notice a change in your electricity bill.Dimmable. For Indoor lighting use only.This spotlight lamp is traditionally known as a PAR16 with a GU10 2-pin twist and lock (10mm apart) base.Please visit the manufacturer\'s website for up-to-date dimmer switch compatibility lists for this Sylvania LED GU10 Spotlight light bulb before purchase.To find the answers to some common questions about LED dimming, please read our guide Dimming for Dummies.Need more help in choosing a suitable spotlight bulb? Read our guide What is a GU10 Spotlight Bulb.