You can change the brightness of labels in-game with the <alpha=#> code and an input from 0-1 to create a brightness effect in labels.

Ex:
If you have one label thats "unlit" with 0 emission and another label that is the exact same but a different color, maybe green like many backlights in jets, with the exact same stuff written on it but with 100% emission you can adjust the alpha (transparency) of it to create a brightening effect in game with a dial, or any input that ranges from 0-1.

This could also be used for avionics to have an adjustable brightess, but you may need to put the code {MFD=1?"":"<alpha=#00>"} Behind the alpha adjustable brightness code to make sure it doesn't appear when it isnt suppose to.

Below Ive made a hexadecimal translator that takes an input (0-1) and multiplies it by 256 (maximum hexidecimals) then if its between a set of values it converts it to the appropriate hexidecimal, if not it stays as a blank string ("")

((Brightness*256<=16)?"00":"")+((Brightness*256>16)&(Brightness*256<=32)?"10":"")+((Brightness*256>32)&(Brightness*256<=48)?"20":"")+((Brightness*256>48)&(Brightness*256<=64)?"30":"")+((Brightness*256>64)&(Brightness*256<=80)?"40":"")+((Brightness*256>80)&(Brightness*256<=96)?"50":"")+((Brightness*256>96)&(Brightness*256<=112)?"60":"")+((Brightness*256>112)&(Brightness*256<=128)?"70":"")+((Brightness*256>128)&(Brightness*256<=144)?"80":"")+((Brightness*256>144)&(Brightness*256<=160)?"90":"")+((Brightness*256>160)&(Brightness*256<=176)?"A0":"")+((Brightness*256>176)&(Brightness*256<=192)?"B0":"")+((Brightness*256>192)&(Brightness*256<=208)?"C0":"")+((Brightness*256>208)&(Brightness*256<=240)?"D0":"")+((Brightness*256>240)&(Brightness*256<=255)?"E0":"")+((Brightness*256>255)?"FF":"")

How to use this?

Copy and paste the above code into <alpha=#{here}>

Demo