Nifty! Where did you get a spectrometer? Crazy expensive?
I've been wondering about using those reptile UV bulbs over HL plant tanks would do anything as far as UV output that the plants may enjoy. One could use a desert UV bub and a tropical UV bulb for the hot and cool end UV.
Nah.... a decent one is about 35USD http://sciencekit.com/project-star-spectrometer/p/IG0023913/
(stay away from the telescope like pakistani made brass models, pure crap)
Not sure about using reptile bulbs.... might be too much. The Giesemann is suppose to be a more "natural" blending of spectra.
But you dunno till you try, you wouldnt believe the number of bulbs Ive tried over the years
Av