Reptile bulbs, 14% UVB radiation and 30% UVA radiation, the rest as a complete light spectrum or so they claim.............
I actually have a luminare with six 54W t5 bulbs.
I do light 4 of those for 8 hours and the remaining two in addition to the main four, just for three hours in the center of my light cycle, simulating midday light.
My plan is to use the two UVB bulbs for the midday center hours and see how plants fish and most important BBA react.
In addition to this indoor experiment in spring as the weather warms up enough (early april), I will set up a 250 Gallon glass tank outdoor, close to my ponds and light it up with Sunshine only, all the rest will be set as my indoor tanks:
double filtration with strong water flow, Pressurized Co2 with super efficient Reactor (my own design), EI dosing, 50% weekly water change, large plant biomass and very rich fish population with very heavy feedings to stimulate BBA growth.
The tank will be shaded by an adjustable tent so that I can adjust direct sunhine duration during the day. My plan is to supply 3/4 hours direct Sunshine and the rest indirect light but I may change that to my liking.