hi tracy : I have been chemical sensitive for about 15 years now , which increases my sense of smell , I have started dmsa and ala ,am on second round now ,also have been doing liver cleanses one of thoses treatments has helped with the chemical sensitivity quit a bit ,don't know which ,but just glad it is getting better. light does not bother me , I worked around jet aircraft for many years in the military so my hearing is not as good as it should be .