Light is usually orange when powered up. We had a red light on one of our spikes when we powered up, pulled out the pwm to find it melted.

Yeah, it smelled bad and was toast. Don't know for sure if the red light was indicating a fault, but I'd put a small amount of money on it.
__________________
Grow the roses of success!
2011 Archimedes 2nd seed,
2011 Waterford Champion, 2011 Troy Simi-Finalist,
2011 Waterford Rookie all star, 2011 Troy Rookie all star
http://www.bytingbulldogs.com/