Your subconscious is excellent at creating detailed images and compelling narrative, but it's bad at committing these to memory. That's why, even though we typically dream for two hours each night, we can usually only remember bits and pieces of the dream we were having just before waking. That's two hours worth of creative thoughts, insights, and adventures that you experienced but won't even remember, much less benefit from. Remee's light signals promote better dream recall by seamlessly introducing tiny gaps of consciousness that link the dreaming mind, which has trouble creating new memories, to a more wakeful state that can 

These same gaps allow you to carry some of that mindful, waking consciousness with you as you re-enter your still in-progress dream. Your mind will be more prepared to notice (and create) new details, and as an added bonus, when your next recall gap occurs there will be that much more in-depth detail to commit to memory. In this way the two features complement each other well. If dreams are a well-spring of ingenuity, understanding, and new experiences, then we owe it to ourselves to make them as rich and animated as we can, and sharpening the overall level of detail is an excellent way to do so