if you use a flash bounce at ceiling to take photos of baby, let said the duration of the burst of flash is at 1/25000 sec, you can took 5 shots and get the photos you want.
but if someone tell you flash will harm the baby, so you move your baby near the windows to get better lights, and you can have a handheld shutter speed of 1/125 sec, f5.6, but you need to spend 15mins there.
in term of the intensity of light falls on baby, can you tell me which is stronger and more irritating?
Pls, its not the amount of light you get exposed to in a duration of a time, its the sudden intense light.
Go use a flash directly in ur eye in a not so litted room vs staying out in bright sunlight. See which one affects ur own eyesight. Hearsay or not, if baby is urs, I got nothing to say.