useful if you have an AC power supply via

Have thus brought the lighting in the office space of 4x20W 4x3W on with the old power supply. Light color is pleasant, albeit slightly greenish. Unfortunately, the yield is much lower than the 20 Watt lamps, as these are only spots and do not tend to emit backwards, because the white ceiling brings even nichts..die 45 degrees I can not be bestätigen- I think its more than 30.
So buy rating with limitations (see above)