How to make a DIY LED Night Light from Oak Pallet Wood
Lights: $8 USD - http://amzn.to/2gToIkA
You'll need a 12 V power supply as well. I don' t know what country you're in, but here's an example of what I used in the US:
12V power supply: $12 USD for 5 - http://amzn.to/2A5IjX9
You could also just use a battery pack if you didn't want to use a wall plug.
Optionally, I bought switches so my kids could turn off their lights without unplugging them:
Inline power switch: $10 USD for 5 - http://amzn.to/2gR7GDI