The Anti-Fog version of the 140KIT160, is for use in applications where condensing and fog may be an issue.
For distances of 140 to 160 metres you will need to use the standard firebeam and a long-range extension kit (the long range kit comes with a backing plate and 8 extra reflectors, you will need to add the reflector from the standard kit to the long range kit with the screws provided).