Designed to replace the outgoing and increasingly rare halogen parabolic aluminised reflector, this MASTER LEDspot LED PAR38 reflector light bulb from Philips delivers a warm white accent beam, class-leading efficiency and a raft of associated savings to boot. Features a ES-E27 Edison screw (27mm) base/cap.A robust design and wide dimmer compatibility make it a popular choice for commercial environments that require constant illumination such as hotel lobbies, corridors, stairwells and so on.The potential savings that can be gleaned by replacing your existing halogen or incandescent PAR light bulbs with this LED alternative are enormous. It consumes just 13W but delivers the same quality of light as a 100W light bulb throughout its rated lifetime of 40,000 hours. This is one of the longest lasting light bulbs commercially available and could conceivably be the only light bulb you ever need to purchase for a particular fitting, depending on usage.When you consider that most halogen PAR light bulbs last around 2,000 hours and consume up to 90% more energy, this LED version represents a seriously worthwhile investment.The example pictured here retrofits directly to any existing Edison Screw fixture and disperses its light within a 25 beam angle.Please visit the manufacturer\'s website for up-to-date dimmer switch compatibility lists for this Philips LED PAR38 Reflector light bulb before purchase.To find the answers to some common questions about LED dimming, please read our guide Dimming for Dummies.