This Krank lighting concept, designed by Efrain E. Velez, is geared toward using light only when you need it. You can crank the handle a few times and you will receive 40 to 60 minutes of bright light using the process of magnetic induction.
This Krank lighting concept, designed by Efrain E. Velez, is geared toward using light only when you need it. You can crank the handle a few times and you will receive 40 to 60 minutes of bright light using the process of magnetic induction.
