E27 LED lamp 4W Star GLOWdim – changes the light color when dimmed The clear LED lamp Star GLOWdim from OSRAM is made in decorative filament technology, making it ideal for decorative fixtures. The lamp is dimmable with many commercially available dimmers and changes light color when dimmed. The further the light is dimmed down, the warmer and more comfortable it becomes (2,700 K to 2,200 K). Dimensions and luminous flux are comparable to a 40W incandescent lamp.