You can simply buy a small lamp with a flexible stem that is self-powered (own batteries). They are inexpensive, and the effect is much better than the built-in elements. First, they are more powerful. Secondly, you can adjust the angle of incidence of the rays yourself, take care of their uniform distribution, and so on. So, the answer in the general case is: no, lighting equipment is usually not needed. If you are already purchasing an e-ink gadget, you need to take care of a bright place for reading.