[raxxorrax]

Don't use a light source without some filter that ensures the spectrum is restricted if you really plan to expose your eyes. I would still recommend not doing that without medical oversight. Spectroscopes are expensive, so you probably don't have one lying around, but it is the only way to make sure you don't have peaks in non-visible light that can damage your eyes.

edit: I don't know any light source that peaks at that wavelength, so you would probably use a broad spectrum alternative and a filter to achieve what you want.