Orange light on LTR-52246S

I have a Lite-On LTR-52246S. When I was doing an overburn with Nero (that failed), I saw the light an orange color. What does the orange light mean rather than red or green?

Green = read
Red = burn
Orange/yellow - pause. It occurs when the buffer empties, or when SmartBurn has kicked in to slow the burn speed due to excess speed for the media.