In about 1.5 -2m distance the lamp casts a spot of about 0.5 m in diameter on the wall, so you can selectively set the tone and has a lot of indirect light in the room. The color "warm white" is also very pleasing to the eye. Dimmable lamp is easily the LED Dimmer "U 6523" from Busch-Jaeger. I run 5 pieces at a ceiling light, whereby the light can be dimming down to an estimated 5-10% of full intensity. Operated separately, they can turn down the same distance to the dimmer 6523U however. In the approximately 2.5 x compares to 3.5 large room, I can turn down the 5 lamps on almost candlelit atmosphere, and I have the impression that the color then becomes even a little warmer. In sum, the lamp is therefore highly recommended!