Gauge display dimmed, why?

I have noticed that mine didnt seem too bright anymore either, i thought maybe i was going nuts or something, because when i first put on the daveb rings they were bling bling, but now they are just meh. I dunno if it has something to do with the dimmer or what, but i constantly am trying to turn it up more, but it doesnt move. Somethings gotta give?
 
Back