This Philips LED bulb is equipped with filament and the WarmGlow technology. With this, not only the brightness is adjusted when the light is dimmed, but also the colour temperature. As a result, the light becomes warmer the more it is dimmed, and with little energy consumption. The bulb spreads a warm white light with a colour temperature that can be adjusted from 2700K to at least 2200K. A maximum light output of 470 lumen is released here, for a consumption of 3.4W (138 lumen per watt). This bulb has a large fitting (E27), a clear finish, and a clearly visible LED filament. As a result, the bulb is strongly reminiscent of a traditional incandescent bulb, and fits well in both open and closed fixtures. 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.