Philips LED bulbs offer their full brightness immediately, as soon as they're switched on. They are similar shaped & size as regular incandescent bulbs so make the perfect replacement. The E14 candle & the E27 bulbs feature a revolutionary prism, designed to radiate light for a brilliant warm white sparkling effect. The LED bulbs are also dimmable with most 'electronic' type dimmer switches (may not be compatible with older copper wire style dimmers) meaning you can take full control of a quality light that is perfect for every occasion. With very low energy consumption saving at least 85% compared to their incandescent equivalents, these lights can last up to 15 years. E27 Bulb 6W = 40W (85% energy saving)470 lumens 2700K warm white Upto 20, 000 hours 110mm tall, 58mm diameter E14 Candle Bulb 3.5W = 25W (86% energy saving)249 lumens 2700K warm white Upto 20, 000 hours 113mm tall, 39mm diameter GU10 Spotlight Bulb 4.5W = 35W (87% energy saving)2700K warm white Upto 15000 hours 55mm tall, 50mm diameter Special optical design creating sparkling light effect True incandescent-like warm white light (2700 K) High colour rendering (CRI > 80) for vivid colours Very low energy consumption; saving at least 85% Lasts up to 15 years