The model I use has
3 LEDs which easily covers a Kindle and 2 pages of a book. There’s also a model with
6 LEDs and a
“Classic” model with a filament bulb. I prefer to read on my back or sitting up with the light around my neck. I just tried on my stomach. It worked around my neck but worked better by placing it on the bed in front of me (it’s bottom is about 3.25 x 2.5 inches and very stable) and adjusting the reflector head. Fully lit up my K3. If I laid the K3 flat on the bed, it lit up better by placing the light on the side. I also also discovered stomach reading just isn’t comfortable for me.