I seem to have a million book lights scattered around. I'm including pictures of the the ones I use most often. The high angle shots are just to identify each light and an overhead light is on. The straight on pics are with all lights in the room turned off. For the most part, the lights look better in person than in the pics but they are a good representative of the differences. I used the lighted cover with my K3 but still use book lights for my K1 and K2.
Green
Mighty Bright XtraFlex2 - I gave up on this one a long time ago because the neck got very loose and I constantly have to adjust it as it slowly flops over.
Silver
Mighty Bright Telescoping Triple LED Deluxe Book Light Kit - I really like this light, the telescoping neck is very adjustable (not as much as the flex necked versions) and stays in place well. It is pretty bulky though.
eBook Lite - I don't have a link for this one. It's very sourcey at both its low and high settings. I also find it a little difficult to attach. I'm afraid I'll squeeze to hard when attaching it.
The Kandle - This my favorite of the group. Easy to attach, great coverage and much lighter than the eBook Lite.
EDIT: Found the link for the
eBook Lite.