The v1 option offers 5-8 hours of lighting, while the v2 offers 10-19 hours. The v3 option provides an impressive 37-51 hours of light, boasting a bright 6500 lumens output. All options are incredibly lightweight and feature a double shrink design, also is IP68 waterproof and dust proof, each one rock light at a time will be making two/ one at a time soon