The luminosity of the small, cold white SMD LED is not so low without the attached cup. Putting the cup on it, which is indeed the intention, the brightness decreases by slightly darkened, greyish Plexiglass very. I would estimate that 50% of the luminosity is lost there. There is really only one 'Funzel' and is in no way to connect with a tealight.
The first rain showed that a little water collects in the cup, the inner curvature and small lateral openings but flows most of it still from. The cup will therefore not fill.
Conclusion:
So all in all a very nice lamp in my opinion, that simply has far too little luminosity only, the rest is, as so often a matter of taste. Strangely enough, the lamp has a particularly bright effect, if one is upside down on the table, but only at the margins ;-).