Well, that's the beauty of the home-made light, you can swap out different size and types of lights depending on your needs.
For example, I used a small flashlight almost identical to the one in the YouTube video. However, there is no dimmer on this flash light, and this little sucker is blindingly bright! Great for Blair Witch type filming in the woods at night, a bit too much for filming "sleeping baby in crib".
So, for a few more bucks, I can either use a smaller (physical) light, or another one (which I have seen but do not own) which you can dim by toggle switch (less LED's light up).