Philips MASTER LED Filament Luster 3.4W=40W Bulb has DIMTONE feature which causes the light to get warmer when dimmed, with high CRI90 colour rendering. Ideal for general and decorative lighting in the hospitality industry, as well as in home environments. Featuring a classic heritage design, Master filament LED Lamps combine the familiar shapes of incandescent candles and lustres with the benefits of the long-lasting LED. Fits all existing fixtures with an E14 small screw socket, as a retrofit replacement for 40W incandescent bulbs. Master Luster 3.4W Dimtone delivers huge energy savings (>80% savings over incandescents) and can pay for itself in less than 1 year. With a rated life of 25,000 hours it minimises maintenance cost without any compromise on light quality.