Now I'm kicking myself for not considering that, though I never really thought in terms of using a chemstick for signaling purposes. The ones I've seen have never looked all that bright, and I've always thought of them more as a quick source of low-level illumination for close up work. Having said that, I must admit to never having seen a Krill light in action. How do they compare brightness-wise to a regular chemstick? (In other words, are they worth the money?)