Well slides would make it a lot easier to scan around (should arrive in a couple days) but light is not really a problem. I put a daylight CFL right by the mirror that reflects it up to the eyepiece and can see fine detail at 600x...plenty bright IMO. Sure I would love a lighted microscope, and I considered just pointing a small LED directly at the viewing window, but the CFL right near the mirror has been plenty. These are basically the same style microscopes I used to use in high school biology class. Not the greatest but its a huge improvement from just smelling the tea and guessing when its ready!