"Cone" of flame
Though the Laser of Enlightenment has a unique beam animation that looks like fire, I don't think it actually creates any kind of cone. The word cone implies a sort of area-of-effect, or splash damage if you will, and the Laser of Enlightenment does not have any such ability. As such, I reccomend the phrasing be changed. I didn't do it myself because I'm not 100% about it--it's possible that the range of the weapon is so short that when I test-fired it at the Deck 13/2 shooting range, the area of effect was not detectable.
Weapon card picture info
Weapon card was captured from a Playthrough 1 run on The Claptastic Voyage with a level 50 Gladiator. The mission was started and finished at level 50. Range testing was accomplished in the DLC zone "Subconscious" using a respawning barrel location and terrain features for distance measurement. It is possible that the range is less than 1/3rd; that was the maximum testable range for the map layout.
For the equipment card I posted, here is the part info from Gibbed's BLTPS editor (note: weapon has not been modified in any way):
Set: Marigold Package Def (#5)
Manufacturer Grade: 38
Accessory #1: None
Accessory #2: GD_Weap_Accessories.Moonstone.Moonstone_Attachment_None
Game Stage: 38