Speaking of lighting, it is nearly impossible to find LED light bulbs that don't use PWM. I have been using Phillips Hue light bulbs and they appear to not use PWM or else they have a higher frequency than others.I’m a former Candlepowerforums flashlight nerd and yes this the same method I use to spot PWM on flashlights.... works very well.
On the downside, it was sort of a mistake learning what PWM is, and how to easy see it.... because once you do know what it is and how to easily see it - you can not stop seeing it.
I used to use PWM lighting, and it never really bothered me... but now.....
Let’s just say, sometimes ignorance is bliss.
PS... I bought the XR for the battery life, happy to say I do not notice any PWM on it.