I've checked a few walkthroughs and Googled elsewhere for info, and it appears that if you forget to take the lighter at the beginning of the game, then you're essentially stuck and either have to replay or resort to a saved game.
Luckily, there are a whole heap of saved game files here: Lighthouse saves
They can be downloaded and used individually. Choose whichever save is nearest to where you are in the game.
I hope that helps you. Let us know if you have any problems.