I have the key light ordered as a Christmas present ever. The light is really bright, like ne small flashlight! The only disadvantage in this case: our apartment keys are slightly too large (ca.2,5cm wide, 2.5 cm long with 2.2 cm housing starts in the screws are rotated)! Side makes the size of the key from nothing, because the key light is laterally open. However, the key does not fit due to the internally mounted bolts "housing" lengthwise. Have no choice as the corners I abzuschleifen- hope it does not cost all too much ...