I bought four of these in a hurry for an upcoming job for our string quartet. Purchase in haste, repent at leisure?
Love the lights, but for a supposed music stand light they have a hard job standing undrunkenly upright on the traditional folding music stand metal lyre. The clip needs a floating hinged friction plate to grip anything thin with more than the one rotating point of contact. I solved it eventually with some 50mm lengths of 25mm plastic plumbing tube to slide over the lyres and into which slide the clips - oh only a couple of hours fiddling about wasted, not fiddling.
Love the lights, but hate the switches. Put them however carefully into your case and on return home, lo! there shall be light from at least one of them - the slightest touch turns them on!! What was wrong with the sliding switch on the older models? I solved it eventually with an elaborate cardboard tray made from a shoe box lid with ingeniously (though I say it myself) punched holes with entry slots that hold the knecks just under the heads so they cannot switch themselves on. Only another couple of hours wasted. (Take the batteries out? - you've got to be joking!)
£88 later, I suppose I should have returned them, but after all that work!?