Honestly, I think there is no difference. There is not much difference in life span (from experience of using for 2 years) There are cases in which valves can be cloudy with gas First is FOCUS? I thought, but STANLEY was similar when I removed the last term of use so we judged the same performance. Because FOCUS is the cheapest price range, I evaluate FOCUS the best with COSPA and performance.
About six months to use exclusively at night in a refrigerator car (Although I used various light bulbs) It looks similar to bulbs What will happen this time? I do not understand without time and date.