I have two 150cp BriteLyt lanterns. I have run a variety of fuels in them. Lamp paraffin, Coleman liquid gas, 1K kerosene, lamp oil that was just well refine kerosene. It is not a good idea to refuel a HOT lamp and having two means you usually have one running while waiting to fuel the second
As I was warned the lanterns have a number of start up problems the biggest is if you do not follow the EXACT recommended sequence you wind up with raw fuel all over the place. Never had a torch but close once. After the pre-heater is going the fuel is vaporized and burns well. One the biggest problems was the ceramic nozzle breaks easily. They have a new Stainless Steel one that works well, of course broken mantles are a problem.
The way the fuel is vaporized makes it very good for heaver oils like kerosene. Diesel fuel "is" kerosene but you pay road tax on it. Diesel has been, may still have a dye in it so inspectors can tell if you have paid the road on the fuel in your car. ... That's the only difference between diesel fuel and 1K kerosene for my lamp ... no road tax and less sulphur.
Now having tried all those fuels I use 1K kerosene it is just safer to handle in case of leaks with these lanterns you will have leaks.
The lamps are very bright and throw off a tremendous amount of heat, a couple lamps can heat a patio. If you get the diffuser globe it makes a wonderful soft light.
The lantern is loud because of the pressurized fuel system. I had a Coleman liquid fuel lantern for awhile it was noisy but not as bad as the Britelyt. An yes it is a pressure system, one of the problems is getting the correct operating pressure, once you are all warmed up it runs good but getting there can be a challenge. Britelyt use to have videos on their website about how to light them with out flaming yourself.
Britelyt made a few important changes to the Petromax design in the fuel vaporizer and a heat shield to protect the storage tank. There are a few other small changes but yes the design is old pre-WWII.
I understand the US Military had Britelyt make up a field kit with 500cp lamp and stove assembly. Because when you are way out among the rocks and boulders the lamp runs of the same diesel that runs the HMMWV, gives you light and hot food. I have no clue how good/bad it was.
=D~~ Kilted