The blue light will take you all the way to the artifact. Just activate it in the upper part of the 'left curved room' where you found it, and let it take you as far as it can (ie. don't cancel it out manually). You'll land a short climb away from the artifact.
You can watch a video of Alan doing that, here: http://youtu.be/_KbkXZDmukY?t=15m5s
Good luck! :)