Only the built-in lens is not correctly calculated and generated mixed colors. In addition, the design of the triple LED contributes to this mixing effect. But at a price of 7 euros you can hardly ask for more.
Who does not like the spot effect and the streaks of color, can easily remedy this.
Simply ring the lamp, unscrew and remove the lens. Then cut a plastic disk with appropriate diameter and insert it into the ring. For example, here is the plastic lid of a cream cheese pack etc. suitable because the lamp does not develop heat. So then the lens effect is off, the lamp produces a scattered light and the electronics are protected from dust.
For me the lamp potters as a backlight of the TV for months and done good service without any problems.
The lamp responds excellently to the FB though it is directly behind the TV and is completely covered through the TV.
I would buy the lamp again.
If you helped with your decision my review, please rate this please to be helpful. :-)