R
R.Lewis
I have heard 'chinese whispers' of some white leds having deleterious
(blackening) effects on some 3M retro reflective materials.
Can this be so - and if so what would be the mechanism?
Why no sunlight problem?
(blackening) effects on some 3M retro reflective materials.
Can this be so - and if so what would be the mechanism?
Why no sunlight problem?