Drying..

Light exposure during drying is vastly overstated with bro-science but at the end of the day, yes photons can degrade trichome heads and contents (namely, by converting them to their acidic form usually). The intensity, or wavelength , of that photon makes all the difference and is a lot to unpack. Certainly do not dry in your grow tent - you could likely do little else to mess up your harvest more... Generally speaking, dry in the dark with gently vapor pressure gradients (as far away from any compressor-driven devices like ACs or dehumidifiers as you can get), for as long as you can. Drying really is the same as drying/curing meats/cheeses/archiving books and artifacts...aka the cannabis-only knowledge folks are largely decades behind unless you move to the cutting edge of cannabis research. The Cannatrol folks have been doing first principles shakeups on how we dry and cure cannabis; the summary is that you only care about bound/unbound water and not ripping trichomes to shreds. Basic dew point theories apply, and boom - perfectly dried cannabis in 4 days and perfectly cured in another 4. As someone very comfortable discussing these topics, the only light I add in a drying tent is UV-A lights on an intermittent timer only when needed due to risk increasing due to external weather that impacts my lung room. UV-A has minimal degradation of cannabinoids, when it does interact it usually creates isomers as often as it degrades to acidic forms, and it only effects the surface...meaning that if you destroy/convert 30% of your potency on the surface, you're still only impacting your potency by ~10% or less at worst on the overall flower while heavily mitigating any pathogen risk. This is only when needed (aka a competition harvest is on the horizon and it is 80% humidity outside for a week at a time and a dry is going on).

Light degrades the trichomes

I always avoid light and humidity is most crucial. Do you have a plant growing in the tent? It's going to be warm and humid in there to be drying buds. temp between 60-70 degrees and 45-55% humidity. I work my way down from 60% humidity. Don't have precise control but avoid higher at all cost. Last thing you want is to find mold. Mine dry for 10-14 days before I store for curing at 58% humidity, in the dark and 70 degrees. Bud from a year ago is still sticky as hell and doesn't crumble at all. Pop in a bowl or roll one, good to go.

I dry in the dark, light is not your friend when it comes to curing and storing. It will degrade your stash almost as fast as heat.

I've done both drying in dark and above the light, couldn't tell much difference, just control your humidity so it doesnt dry to quick because of higher temps above warm lights.

It depends on the light levels and intensity. Direct light will harm your buds for sure, degrading cannabinoid and terpene concentrations. But if it's above the grow light and light intensity is low then I say go for it. I personally have never done it so I dry in a dark tent just to be on safe side. It's a good question and I think it's something I will experiment with.