I am curious to know what is preferred for emerged culture of Crypts. I have emerged tanks in natural and artificial light and I would like to know which one is best for flowering or growth of cryptocoryne species.
Due to your location, your day length could be pretty short. Most crypts are found pretty close to the equator - pretty close to 12hr days. I'd say that would be a factor to consider.
Additionally, you want to consider heat building up when using natural light.
It may be cold in CO but it is very bright, about 300 days of sunshine a year. Still there is nothing to be done to change the duration of natural light. Is there any info which details how photoperiod and intensity affects Crypt growth and blooming?