356 nm UV LED Strip Lights for Cyanotypes Application

I am trying to make a UV lightbox for making cyanotypes. I want to make a box that will print up to 16x20, Will 9 strips at 20" long spaced to fit the 16" wide box be enough to print cyanotype? That would be using your largest roll. 

Our UV LED strip lights sound like a great fit for the cyanotype application. Unfortunately, however, our experience and data on cyanotype exposure are limited, and we would not be able to provide any definitive answers about whether or not a certain amount of UV exposure would be sufficient for your needs. If you do have any data on UV exposure values (typically measured in mW/m2, for example) we would be more than happy to assist in calculating this for you.

On the other hand, if you have any previous experience with fluorescent UV bulbs, that may be a good starting point for estimation purposes. Our UV LED strip lights emit approximately the same amount of UV as a fluorescent bulb on a per-foot basis. Therefore, if we calculate out the 9 rows of 20 inches, that works out to approximately 15 feet, which would be around the same amount of UV output as four 4-foot lamps.

We see that you've settled on the 365 nm wavelength, which is most likely the most effective wavelength so that certainly sounds like a good choice.

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