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I'm not sure exactly how long you need the headlamp to run for, but here's a wide variety of headlamps that should give you plenty of options to choose from. Starting off with the smallest size that I think would work for you is the AA/14500 headlamps. Fenix HM23 V2 Nitecore HA15 UHE Wurkkos HD12 The next step up you have the CR123/16340 headlamps: Fenix HM50R V2.0 New Olight Perun 3 Mini Olight Perun 3 Mini on Amazon Fenix HM53R Skilhunt H200 Mini There are quite a few headlamps that use a 18650 battery, so there are plenty to choose from. Acebeam H15 2.0 Acebeam H35 Nitecore HC60 UHE Nitecore HC65 UHE Klarus HL1vn Skilhunt H200 Skilhunt H300 Sofirn HS21 Sofirn H25LR Sofirn H35R Spera SH18 Emisar DW4 Dual Channel Headlamp Fenix HM60R V2 Fenix HM61R V2 Fenix HM61R V3 Fenix HM62-T You have 3 different options when it comes to the Fenix HM75R and you can add an additional battery pack on the back of the headband to give you a longer runtime and it balances out the headlamp. They all have a red LED mode that puts out 120 lumens. You have your standard Fenix HM75R. Fenix HM75R Next you have the Fenix HM75R Superraptor 3S that's targeted for the Scandinavian market. You're also able to run the spot light mode and flood light mode together. Fenix HM75R Superraptor 3S Battery Extender for Fenix HM75R Last but not least you have the Fenix HM75R Topaz, which is the high CRI version of this headlamp. So if your tasks require you to use a headlamp with high CRI, this is the headlamp for you. Fenix HM75R Topaz Wurkkos HD25LR Good luck with your decision and hopefully one of those headlamps will work for you. 👍