T5 lights for 12 hours, temperatures in the mid 70s to low 80s.
This is the best I've grown the cultivar so far in the past >15 years!
And it is not even the full potential of the plant. A combination of very bright light and cool condition will turn even the teeth maroon. Sigh...not possible at my growing area though.
Photo was taken in natural light and some orange pots in the background to show the actual colour.