Pardon my quote from gremlins.
This is a nice little bright light, it does spill a lot of light out abd can be positioned easily over any part of my 16 channel desk.
There is no on off switch so once connected its on. However, the lighty bit can disconnect from the neck easily so this is an option if you want to go back to darkness.
I have only used it a few times, but so far it stays exactly where i move it to, and the light is bright enough for me to read the area directly below it, I do need to move it up and down whilst looking up and down the channel mixer as the light is not quite enough to reveal all my desks dark little secrets. But then again, if it did, I would be very distracting to the band.