Has anyone ever seen any threads covering LED roadside flares. I used to have an ACR Firefly that I kept on my boat, and I'd like to find something similar to carry in the car in case of a breakdown. After Googling "LED flare" I see that there are loads out there, but I'm just wondering if they are as visible as the Firefly. Naturally I'd like to find one that could withstand being run over by a herd of elephants and is waterproof to a mile!