It might, it might not. A different study would be needed.
Hypothetically, the night lights themselves might trigger functions which need natural light in order to reach completion. This could cause a series of incomplete chemical processes which accumulate over time and eventually reach a complete breakdown.
Think of it as a program running incorrect code or a car running on the wrong type of fuel. The damage remains unseen until it becomes irreversible and the body is done for.
You should have faith in humanity. But faith is illusory and reserved only for things that are highly unlikely to happen. So your faith was well placed, it just didn't pan out. Which is pretty standard overall.