Join me at dusk to collect a few crazy good rocks that glow under long wave UV (black light). This is a public site in downtown Bancroft in Canada. I am using the 4 watt Way Too Cool Convoy flashlight here, but have no affiliation with the company. I bought the lamp a while back. I notice they now have a 6 watt which should be brighter but also probably heats up faster (which is to be avoided by turning off once in a while).

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