The Niteye TF40 is an extended version of the TF20, with the same output, but double the runtime. A rotary ring on the head lets you quickly switch outputs and access strobe. The light is powered by 4 CR123s or 2 18650s.
1. Light source: 1xCree XM-L U2 LED
2. Battery: 4xCR123 0r 2*18650
3. Output & Runtime:2-520LM/2-100Hours
4. Output regulation: magnetic ring infinitely variable dimming switch and tail cap switch
5. Circuit design: constant current circuit, constant brightness.
6. Working voltage:6-12V
7. Waterproof to IPX-8
8. Material: stainless steel and aerospace aluminum
9 Dimension: 220 mm(L) X 49 mm(D)
10. Weight: 212 gram