The glass body of this dimmable Osram LED 5W PAR20 reflector light bulb mimics the exact size and shape of traditional 50W PAR20 light bulbs, while still providing the energy-saving benefits of an LED light bulb.It is perfect for those wishing to upgrade to LED light bulbs while ensuring that the new light bulbs will not look out of place with existing fittings.This Osram Parathom LED PAR20 reflector spotlight is a professional low energy alternative to the older PAR spotlight light bulbs. With comparable design, dimensions and luminous flux comparable to a halogen PAR20 lamp, re-lamping is easy and instant 100% light, no warm-up time, make this light bulb perfect for shops, museums, art galleries and outdoor applications in suitable IP65 luminaires.Features a commonly used ES-E27 Edison screw (27mm) cap/base.Please visit the manufacturer\'s website for up-to-date dimmer switch compatibility lists for this Osram LED PAR20 Reflector light bulb before purchase.To find the answers to some common questions about LED dimming, please read our guide Dimming for Dummies.