As I suggested in the 1.3.3beta topic, having a threshold for each led to light up(for example when fuel is between 10-5%) would come in handy.
What I am trying to build is a warning light to stop me running out of fuel. Initially, I wanted 2 LED's; One to indicate running low, and one for pit in this lap. However, a better solution requiring only one LED occurred to me. If each LED can be set to blink faster or slower(or not at all) depending on the value, I can have one orange LED come on when fuel is low, and have it start blinking faster when fuel runs out further.