Sorry for continually making deceptive titles but this is how to get people attention.
this is my idea of how lights can be added into the game. now, im not a programmer so i have no clue if it will work.

firstly, paint
primary: the color when its off
Trim: the color when its on
^ or vise-versa

configuration when you double click it

activation group: 8=default

type: flash , flash-double, toggle

toggle
when toggle , it will stay on continuously, no other collapsing options

flash
will flash or strobe with the following option collapsed
-delay
-number of flashes per sequence(1-3)
-interval between flashes

flash-double
will have 2 different sequences connected together with the following collapsed
Seq. 1
-delay
-number of flashes per sequence(1-3)
-interval between flashes
Seq. 2
-delay
-number of flashes per sequence(1-3)
-interval between flashes

delay
the time taken before repeating the sequence or continuing to the other seq.
Number of flashes
how many quick flashes it makes in its sequence
interval
the time taken in the interval between one flash to another if more than 1

here is an example
(.=0.10seconds)
(F=flash in game)
(->= switch sequence
(>>=switch back sequence and repeat)
activation - noone cares
flash -double
Seq.1
-delay -1 second
-number of flashes per sequence -2
-interval between flashes -0.2 seonds
Seq.2
-delay -1.1 seconds
-number of flashes per sequence -1
-interval between flashes -n/a because theres only 1

what it will look like, (come to think of it it might be laggy and the light might just have to be a hud effect rather than light up the surrounding enviroment)

Seq. 1 Seq.2
F..F .......... -> F........... >>

break it down further? ok

            Seq1                                                          Seq2
  interval(0.2s)             delay(1s)       ->         interval(n/a)          delay(1.1)>>                       F  .      .       F       ..........           ->               F            ............ >>

another example (try and guess the options i set)

              Seq.1
   F...F...F ........ >>

Disclaimer, if lights do get added i will be aware it was not because of my whining. this game is perfect already, it is just mere food for thought