The carbon floodlight is the coal powered version of the floodlight.
Toggle invert state via shift right clicking with an empty hand. Right click with a wrench (when no wrench is available try a stick) to change mode.
It uses 4x as much fuel in Cone modes. 1 Coal gives 5 minutes of fuel, so 1 minute, 15 seconds in cone mode. Other Fuel is supported as well.