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This will sounds goofy, it is, but my wife has a huge psychological great of cockroaches and spiders. I've gotten her to the point where she will let me relocate spiders, but roaches, no way. So... I'm looking for ideas on what wattage I might need in a blue or red laser (we have green walls)...

Howdy! I'm old enough that I recall watching the news release of the first viable LASER being demoed in the lab! Being a science fiction nut from the age of being able to select books on my own, I was hooked! My evil, I mean, safe, sane, well-thought-out plan is to build a pistol-format laser...