I'll look at the Coleman lanterns - white gas fired lanterns first. Single and dual mantels. A bit of background Coleman has been making liquid fuel lanterns since before my father was born. (Short story) Coleman® Company History W.C. Coleman could see the light for the darkness. The young salesman was taking a stroll after a hard day’s work selling typewriters, and spotted a new type of lamplight in a drugstore window in Brockton, Alabama. This new light burned with a strong, steady white flame and was fueled by gasoline. The standard lamp of the era burned kerosene and produced a smoky, flickering, yellowish light. W.C. was stricken with very poor eyesight, and was very interested in this new, steady white light that enabled him to read even the smallest print in books and on medicine bottles. Coleman saw potential in the new light, and through his vision a new company was born that would put America’s farms and ranches in a new light, and would eventually make his name synonymous with outdoor fun. So - Why a liquid fuel lantern? Years ago the choice for light at night - at home or camp - was a gasoline or kerosene lantern. The pressurized gasoline lanterns put out more light - a white light - and so provide the best light to work with. I have several for the simple reason that even at temperatures of -40F, a maintained Coleman pressurized gasoline lantern will light and provide bright light for hours on a single fill. The lanterns are still made and sold today, so replacement parts are easily had. The design hasn't changed in decades, making it simple to use and maintain. Full documentation is found on line both from Coleman and from dealers.. There are many You Tube videos that show how to operate, clean and perform maintenance on these lanterns. Like this A common question set is - How long will a Coleman pressurized gasoline run on one filling? The correct answer is easy - it depends. The lanterns came in several models - single and dual mantle and more than one font (tank) size. The rule of thumb time I count on is 7 hours hours. How much light will a Coleman lantern produce? .Single mantle - about 700 lumens Dual mantle - oddly, not double, 700 lumens If you look at the ads for these, all the liquid fuel lanterns advertise the light output at about 700-800 lumens. As an aside, the propane lantern ads claim light output of 1500+ lumens.. Here's a list of common models and their output in Candle Power: (H/T to the folks at Coleman's Collectors Forum) -222 Peak One (125CP) -222A; 222B; 226; 229; 3022 (125CP); -3025 (125cp) -214; 214A; 222 Colmax; 234 (175 CP) -241; 241A (200 - 250) -241B (200-250CP) -242; 252; 252A; 282; 285(220 CP) -286; 286A; 288 (220CP) -241G; 243 (250CP) -All the Quick Lite models; 200; 201; 218; 220 all versions (300CP) -The Sun, (2 × 10500 CP) -223; 225; 228 (All variations)(300CP) -242 (All variations except A); 246; 247; 249 (All variations)(300CP) -275; 275A; 290; 290A; 295; 331; 335; 321 (All variations) (300CP) -325; 325A; 333 (Colmax); 335(350CP) -339 (350CP) -206 (550CP); -236; 237; 238B; 555 Colmax; (500CP) -621 (All variations)(550CP) -625 (All variations); 635; 635A (550CP); 635B (550CP) -639 (All variations); (550CP) -2000 Northstar (550 CP) Candlepower and lumens measure different light qualities, and 1 candlepower equals 12.57 lumens. When measuring lumens, you can also think of it as the light illuminated in a 1-square-foot area one foot away from a single candle. Now you know Are Coleman lanterns safe to use? Yes - but. Coleman lanterns burn a volatile fuel, gasoline. They produce a lot of heat. They produce a lot of fumes and CO. These lanterns can (if misued) - and have, burst into a flaming ball of death. This, I believe, falls under the "You can't fix stupid". When maintained and used as designed, these lanterns provide decades of reliable service..