If the 'health' benefit or bio signal for this effect, requires UV radiation then there is very little that can substitute being outside for 1 or 2 hours a day depending on the season.
Interestingly, red wave (IR) light appears to influence cortisol levels but not melatonin. [1] IR also makes it through windows as any cat can attest.
Getting outside for an hour or two as often as possible, regardless of the season, is probably a good idea, but it doesn't appear to be strictly necessary for modulating circadian rhythms.