This LED filament bulb from Philips provides a warm and atmospheric light, and does so in an energy-efficient way. The bulb uses WarmGlow technology which ensures that the light can be made even warmer; when dimming, not only does the brightness of the light decrease, but the colour temperature of the light is also scaled up. The LED bulb has a consumption of 3.4W and spreads a warm white light. This light can be adjusted from 2700K to 2200K by dimming the bulb. The maximum light output is 470 lumens (138 lumens per watt). It has a classic pear shape and a large fitting (E27), and fits well in both open and closed fixtures, where the LED filament stands out well and is reminiscent of a traditional incandescent bulb. The light emitted by the bulb also has a high colour rendering index (CRI value) of 90. This means that the light quality is high and the light colours look very natural.