After much back and hersenden I got a brand new solar glass, ie glass and module, sent free of charge. I put both modules, for a tip by Stefan perpendicular direction sunbeams. The module of the first delivery then gave a little longer than before, but overall with a half-hour light period is still not satisfactory.
The second glass is fine. I like that you can decorate so beautifully the sun Glass, it also looks good when the light is not turned on.
Finally, I must say, however, that the price is quite well high in relation to the benefit of the glass, hence the three stars.
