Now updated for 2.0 thanks to Derpumu! Make lamps brighter with this one tiny mod. The only thing it changes is the radius of the light for the small-lamp entity.

Specifically, it changes the light radius from "40" to "70". Though the increase is less than double, due to math, it covers roughly triple the area! Wow!

NEW: Now you can make the amount whatever you want! Wowee! Still defaults to 70 though.