Light from Nowhere Achievement in TurnOn

Level 1 - "First Introduction"

After the scientist opens the room up with a key and you go through the box to enter that room, you'll get a checkpoint (the big generator that opens up when you pass over it). You now have to jump up wires to progress. One of these wires actually goes into the wall on the right side as you climb. It's difficult to spot, so just push right on each wire as you climb. You'll go into the wall and turn on a lantern, unlocking the achievement immediately.