Here's an option if your interested instead of regular bulbs.Might be useful if wind screens are a problem to remove.I bought a set to replace my tail bulbs after blowing one only after 4000 miles.
I have used plug & play LED's in my offroad bikes tail light for two years w/o fail,I used to strech out the filament in stock bulbs.It looked like a rollercoaster ride inside the bulb.
For best results the LED color should be the same as the lens color. As an example: a red lens will filter out all but the red portion of the light so if the light is all red, none or very little light will be blocked by the lens. The light from a White LED contains very little light in the red portion of the visible spectrum so most of the light would be filtered out by a red lens.
Also note,Before installing in the instrument cluster:
They have many types in ea. style of bulb,they might or might not work?
I haven't tried a luminary application yet.
LED bulbs are generally not as bright as standard incandescent bulbs, they have many advantages over filament bulbs (longer life, faster on/off times, lower power consumption, more vivid colors) but brightness is not one of them.
They are generally not as bright but some of them with large numbers of LEDs, will appear brighter than filament bulbs.
As an exception, the new 3 Watt Luxeon LED car bulbs are as bright or brighter than most standard filament car bulbs.
The light is distributed differently so they can appear brighter in some applications and not as bright in others, it depends on the size and shape of the bulb housing and reflector.
Most LED bulbs emit light like a flashlight, all out the end. Regular filament bulbs emit light from the end and all sides, so they will be better suited for some lighting applications than LED bulbs.
This is the same reason why they do not rate LED car bulbs in lumens or watts, they would be a deceptively low numbers because the light is measured from all sides and the end on standard filament bulbs, but only from the end on LED bulbs.