Instruction: Given a question and the related document, and generate the answer to the question based on the information provided in the document.

Input:
Question: Are there multiple intensities for the light, or just on/off?
Document: We use these in our kids' rooms for diaper changes. We also use them for reading lights in bed. They put off a substantial amount of light, but not disruptive. Great colors! And you get 4 lights, so you always have one handy or can keep them in multiple rooms.
I gave these a five star rating because I think they work just great. I love the bright light that illuminates across the page of my book or my Kindle. I've tried other, weaker lights before and they caused a lot of eyestrain. This is an especially good deal for the price because it's great to have multiple lights available and not have to worry about hunting one down, or transferring the light if you have multiple books going. Highly recommended.
I bought these after a much more expensive reading light quit working, apparently due to a problem with the fiber optic cable. So far, these inexpensive little lights have all worked well for me. I haven't experienced any problems with replacing batteries as mentioned by some reviewers. The light intensity is not adjustable, but has been fine for my needs. They aren't fancy but they get the job done. It's nice to have multiple lights to leave in the various places I occasionally read at night.
It's very bright and worth so much more than what it's being sold for! I also sometimes use it for my laptop at night. Can have multiple uses. I haven't done it yet, but I will also be using it to read my music when I play my piano at night. I can't believe you get 4x for such a low price! This is a STEAL deal!
i like the price and brightness of this light.i am using it for my church praise team. working good.
let there be light !! nice and so handy for a quick little lightclips on and can be great for keeping in car or purse
i love these lights. i use them on my computer, booksand everything ican find where i need a small light.
They are light weight and easy to work with, give out good light and the colors give my four grandchildren their own!
These book lights are just what we needed. They have a nice bright light and attach easily to several kind of headboards.
This is an amazing little light, I can not believe the brightness this little thing throws off. So happy I bought them.
Answer: Just on and off.  Fairly bright, but doesn't hurt our eyes like some have...because you can angle the light in any direction with the bendable cord.