Use a 1000watt Metal Halide lamp?
It runs in the 93k range for color temp, so very white/blue (also like the sun you shouldn't look directly at it).
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I used one to grow (veg) weed, people also use them to grow coral in saltwater tanks (process takes years).
LEDs IMO are bullshit when it comes to UV radiation which is what you actually want (not light).
"Ultraviolet (UV) is electromagnetic radiation with wavelength from 10 nm to 400 nm, shorter than that of visible light but longer than X-rays."
"The metal halide medium pressure UV lamp is constructed from a quartz envelope containing mercury with metal halide additives that create specific wavelengths of ultraviolet radiation. The addition of metal halides creates a shift in the spectral output, producing longer wavelengths enabling a greater depth of cure."