Garmin Instinct 2 Screen Protector and Solar Test

Follow up to my previous video, got a plastic screen protector and it applied perfectly. However my initial tests showed about a 50% decrease in solar.
Holding UV light unclose
No Protector = Full UV power
With Protector = 5 bars (about half)
Holding UV light 2" above watch
No Protector 5 Bars
With Protector 3 Bars