Nope. It used to be less. The older ones, i.e.; especially those made in 1930s were mostly rated at 300HK.
Probably less than you might think. Like a lot of lamp makers they appear to be a bit casual about light output. Up to around WW2 826 was rated at 300HK but by 1954 was rated at 350cp. 300HK is actually about 275cp but the company didn't seem to have a problem with converting HK to CP directly. They did the same thing with their 500HK lamps which became 500cp when in fact 500hk is near enough 450cp. Mind you that is not to say they actually lied. The change to cp ratings may well reflect an upgrade and the cp rated product was actually brighter. Point is that 1HK is about 0.91cp so those pre WW2 lamps are rated well below the later product. ::Neil::
@Tom Pedersen It can also be a Petromax 523.And then it has 500cp.826 and 523 only differ in jet and needle. Regards Reinhard
Good Morning my friends. Just a question for the Petromax experts Is the nozzle and nozzle needle same size for all sizes petromax. 150cp- 350cp and 500cp ? The lantern is probably from the fifties. If not, please indicate the different sizes Thanks Tom
Hey. Excuse me. I ask because I am ignorant in this area and try again. I don't know what makes a lantern a 250 cp or a 500 Cp Is the nozzle and nozzle needle the same size on all types of Petromax lantern? Yes or no. Tom
Yes, you are right but many people call the part where the mantle is tied on 'the nozzle' which can be confusing. It is not a rule, but here, we usually refer to the part at the top of the vapouriser (or generator) as the jet. Simply put, it is the size of the jet which determines candle power, the bigger the jet, the more light. In practice, it's not as simple as that, a 500 cp jet will not work in a 150 cp lantern and a 150 jet will not work in a 500 cp lantern. You can use a 500 cp jet in a 350 cp lamp and vice-versa but you must also change the cleaning needle to match the jet, a 350 needle will not go through a 250 jet. The following sizes are from the book Light and Heat From Hydrocarbon Appliances by Dr Herman Lahde. 100cp 0.12mm 200cp 0.17mm 300cp 0.20mm 400cp 0.23mm 500cp 0.25mm Hope this helps answer your question. Henry
Thank you very much Henry. That was exactly what I needed to move on. I'm not very good at English and use Google Translate and try to correct the language a bit. Sincerely Tom
