Actually really good, but unfortunately the manufacturer unfortunately had the bekloppe idea to create this thing made of translucent plastic. The white focus ring moves at times with narrow beam some and is very bright translucent and faded in the eyes of the wearer. The red LED displays also. All this would not have been the case with black plastic. Tests that no one? One can really only use the lamp, unfortunately, if everything abklebt black, which is very inconvenient when focus ring. The red LED is also easy over white beam directed upward, which makes them for nightly reading inconvenienced they just can not get far enough to a comfortable position down bent.
All this is all the more annoying because the rest of the lamp is really good, very bright, good focus, built tough.