So what's the deal does indoor light effect renova (tretinoin). ? ie. iphone light , tv light or florissant bathroom lights ? please explain in full

Uv Radiation: Shopping in a mall for two hours is equivalent to a full hour in the sun. Thanks to the bright, fluorescent lighting, you don't get sunburned but you do get the full hour of uv rays. You can expect the same in hospitals and clinics. Copiers, computer screens, welding, and various other kinds of lighting are additional sources of uv rays. Long term use of Renova (tretinoin) can make you more sun sensitive.

Light with UV: In general the light in the visible spectrum is not as dangerous ( even an ez bake oven uses visible light ) as the light in the uv spectrum. These other sources are unlikely to amuse any damage unless held extremely close for prolonged periods.