I finally took out the cluster and found that there are couple of light bulbs, and i'm wondering where can i get the black light bulb. Black light against the white numbers, and needle, it'll glow just like indiglo...more like what the lexus indiglow. Let me know ur opinion

 

I'm not sure how it would look since i haven't taken apart the gauge cluster in my tl before i was wondering do the numbers have a color filter? because that will block light from other bulbs. I'm guessing the gauge cluster uses 194 bulbs also reffered as corner bulbs and lots of 74 bulbs that are known as indicator bulbs. They sell UV bulbs on this site http://autolumination.com/74.htm it's like black lights. If you know what your doing you can do a led conversion by soldering in leds and resistors if not just buy the bulbs they offer