This is the maximum flame with a fully loaded tank after 4 months, not only does it burn after only 7 attempts. What a perfect POS flame size, while it worked, wish I had bought it. Update 3/12/21 so I ordered a different flashlight and still used it with a tiny flame. I thought the flow was restricted so I took a tiny wire brush and some rubbing alcohol and cleaned down the hole and tube. Then I banged my head on a piece of foam until everything shifted. Now it works like new. Upgraded it from 1 to 4 stars because why would I clean the flashlight like this? I've never had to do this to get the burner to work properly. TLDR: The burner fuel line will clog over time, clean with a pipe cleaner and tap the head on something soft to dislodge dirt.