Quoted from branlon8:thanks for these infos. I will need to investigate this on my game. I have amassed a large collection of incandescent bulbs so I can pick out the brightest ones.
I‘m not sure it‘s entirely true that LEDs don‘t dim, but I realize that due to their faster response time they may appear to blink or flicker while an incandescent bulb may indeed appear to dim. I will need to try the dimming function (setting 1-8) in the menu to see what effect this has on LEDs.
Why disable the dim function ? At worst the LEDs will blink (I noticed in particular the LEDs behind the river standups blink, but it‘s not irritating (even if it‘s not necessarily Mr. Nordman‘s intention…). If there is ghosting I have not noticed it.
I do not know if these OCD boards are readily available in EU, I have never seen them for sale, although I have never researched it in depth.
Well LEDs CAN dim for certain but strictly for the purposes of the discussion specfic to WPC pinball machines - they don't without flickering unless you use a 3rd party board. If the OCD boards are not readily available I did read a comment in some other thread recently that there are similar products available that are made in the EU somewhere but I don't remember the name of it.
Ghosting is completely different and happens to controlled lamps, not GI. I don't remember the technical reasons too clearly but sufficit to say that it is caused by the matrixed / pulsed circuit design. These can usually be eliminated by using non-ghosting LEDs if you don't want the expense of an OCD or OCD like board and can live with the rapid on/off timing of an LED versus the smoothed ramp up/down you can get from the OCD type board. Some people's eyes are bothered by the flickering and others seem to be immune to it.