Here's the review of Spartan117gw on the Litebuck variable frequency strobe which are small, lightweight, and waterproof. These are MOLLE-ready so you can mount it almost anywhere in your gear, most specifically areas where it can have the most visibility in case you need to turn it on. You can use it for lighting, as marker when you're hit at night games, or also as a distress strobe. Read the full review in the video below.