I think I responses to the wrong comment, here's the reply:

Yes, I agree.

Which is why I only got one after being declined from a sleep clinic for absurd reasons.

Mine uses a green light, but afaik it's more or less the same as hospital ones. Just cheaper shit. Like how an aeroplane and a paperplane are technically both aircraft. You could study aerodynamics with paper aeroplanes, but it's gonna be much easier if you don't have to resort to that but can actually study the knowledge available to make reasonable choices.

the public healthcare here just plain up denied my referral from a psychiatrist. despite more than 20 years of sleep problems. if I could meet the person who made that decision, I'd have a few strongly selected words to tell them