in market different type of speedometer bulbs are available. stock bulbs in red, orange and blue glass r found. also these with 9 high power LEDs r available. pair of LEDs costs 60 rupees. normal colored bulb costs rs 5 or 10 each.
i used blue bulbs for years and one got burnt. so i installed red normal bulbs now. i like red color more. anyway strong blue light is also beautiful. but these work with jdm clusters as they have glowing needles. i installed white LEDs in dim head light bulbs. they r working for years.
LED bulb and red bulb and photos of cluster from my cuore..

