Philips Master Glass LED Bulb Dimtone GLS A60 3.4W=40W CRI90 E27 Screw, Clear in Warm White 2700K-2200K with dimming: featuring a classic heritage design, Master Glass filament LED Dimtone Lamps combine the familiar shapes of classic incandescent bulbs with the benefits of the long lasting LED technology. They deliver beautiful, decorative warm-white light while saving around 30% on energy costs compared with normal LED bulbs.A rated lifetime of 25,000 hours, minimises maintenance costs without any compromise on light quality. Can be used together with most leading-edge dimmers, enabling further efficiencies to help customers recoup their investment in less than 1 year. Furthermore there is no harmful UV or IR in the beam.