The lamp has a sufficient for working on the lectern luminosity. The holder can be almost anywhere fix. Unfortunately for permanent office work is too short a few centimeters of the flexible arm. It should z. B. a mail folder under the lamp can be turned over without striking the wallet. This is only possible if one adjusts the lamp very high, which they, however, also travels backwards and the work area no longer illuminates so well. The delivered light has a lot of dust in the luminescent body. This should be avoided with a lighting manufacturer. Unfortunately, it can not open the. I'll keep this FAQ.