Comment by adrian_b
13 hours ago
For reading black & white text, incandescent lamps are perfectly fine.
However, if your book has color illustrations, a high-quality neutral-white LED lamp is better than any unfiltered incandescent lamp.
A standard white illuminant with filtered incandescent lamps would be even better, but such lamps, as they were made a century ago, were extremely good space heaters, which may prevent their use for reading a book.
The OSRAM halogen lamp I use has special filters, and looks greenish when it's turned off, so it might not be a "brute force, let everything through", 25¢ halogen lamp. The bad thing is it's not being produced anymore, but I have a couple of spares.
I went through university with the same lamp/bulb, so that combo doesn't create the unwanted reflections much. Also, I still print everything in color, because a good color choice still boosts understandability of the material at hand.