In 2015 we had common-anode LED strips on the forklift verticals, and drove them through MOSFETs connected to the RoboRIO PWM ports. (We switched to CAN bus Talon SRXes, so our PWMs were totally unused.)
We were reminded (the hard way) that the PWM ports are shut off as part of the safety interlock when the robot is disabled. The plan in 2016 was to use the
Adafruit I2C PWM driver instead, assuming the I2C port isn't shut off when disabled.