As long as they are not Duracell I am in. Duracells have ruined more high end flashlights and game cameras for me than any other brand. I refuse to purchase or use them due to poor design and corrosion issues.
I included a pic of the back of the package that has all the details on run time, but to answer your question...1.5 - 5 hours depending on the setting.
Scored a set today. They do come with rechargeable battery packs and Duracell Aaa batteries. I’ll let the Duracells sit in a drawer for 4 months then one will corrode and ruin the others. Looks like a good buy. The rechargeable’s are great options.
Been buying head lamps from Costco for years - you can't beat the buy and the Duracell batteries will leak. Thought was smart and joined Sams for the Energizer batteries - those leak too.