And, those studies rarely include the warnings!!
TEST: Place a common 60 Watt, LED, Day light bulb near your face, and with your eyes open, turn it on and back off. If you have spots in your vision it is to close. Sadly, far too many Parrots are blinded by lights that are too close.
The vast majority of the uses are in fact for Reptiles, which are totally different than Parrots! Never use Reptile advise or products for Parrots!
The sad reality is that Parrots have zero skin sensors (plus very thin skin) regarding light! Providing very bright lights is dangerous!!
Birds /Parrots register light in their eyes. All they need is general room lighting that varies /duplicates the natural day in your region of the World.
Please stop over thinking this as you are likely to Blind your Parrot! Or, to cause skin cancer!