My worship team went years without using a light on their music stand. But, we would always encounter a problem during special programs where a song starts during a blackout. Not sure why we waited so long, but these little lights have been very helpful.
We run our room pretty dim during worship, so these lights were the perfect fix for those struggling to see their music. They are bright enough for the musician but not distracting to the congregation. I highly recommend buying rechargeable batteries as they will need to be changed every few months.