Are those light mite's extra bright? I think I still have the stock ones in the Slikstik panel.
I wouldn't call them "extra" bright. They do use a super bright high flux LED. They are adequate for a normally lit room. They include a dimmer as some still find there is too much glare at full power.
I've only had one or two say they weren't bright enough for their taste, likely due to a very brightly lit room or a room that gets direct sunlight.
Keep in mind though you can assemble your own with up to 4 leds in whatever brightness you like. Also you can get a little more brightness out of them by mounting them directly to the trackball instead of using the pcb mounting foot method.