Illuminagender is a gender that is illuminated vaguely for a light and the rest gender is in a dark place and it's imposible, hard or blurry to see and the person cannot say the other part or may feel it but cannot make out exactly the gender itself due the darkness.
This gender can be very similar to Tenerbrigender but with a light and isn't limitated to be in a room, can be in all place that is dark.