Help is on the way! I just purchased a wonderful piano lamp for much less than $100.
2 or 3 weeks ago, I played rehearsals for the Brahms Requiem. The rehearsals happened to be in a space with poor lighting.
One of the singers brought a light for me to use in the 2nd rehearsal. It worked so well that I now have one of my own.
It's a double mini-book light made by Mighty Bright, called Duet2. The beauty of it is that it lights both the left and right-hand pages completely, no glare, no shadows. The lights are adjustable in terms of brightness and position. And they don't shine in the audience's eyes.
I paid $20.33.
The other wonderful thing about this light is that it's so easy to carry around! I no longer have a need for the older music stand lights used in pit orchestras.
You can see it here: Mighty Bright Duet2
The Amazon page includes pictures that show exactly how much of the music is lighted, with no shadows.Gretchen