I have used black lights before for night time viewing but I stopped because they put out a lot of UV light. They sell a blue version of the same light, in fact I use it at my work to switch light cycles all the time, it is bright enough and it doesn't give off all that UV. Its like using a black light to view scorpions, it is really cool to watch them "glow" but it is harmful to them in the long run to keep them under it all the time. Hope i helped





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As for wattage, I wouldn't go higher than 50W.
