The bright side.
You can actually get The Bright Side by turning on and off the same light source 1000 times in a row. I had a hunch and did a little experiment and it worked. use something that burns forever that you don't mind wasting. I preferred a cell phone. You'll need a few. Just press the button really fast so that you don't need to get like 10 cell phones or something. Makes this achievement really really fast. Took 5 minutes. That's a few hours of needless gameplay saved, since you don't need to keep going through the game to pick up tons of matches, candles and whatever else to get this one.