Princeton Tec Vortec headlamp includes halogen and standard lamps. Run time with halogen lamp is 5 hours. Run time with PR-40 lamp is 8 hours. The Vortec has been configured to provide significant extended burn time using lithium batteries.

Battery	4 AA's, included
Dimensions	5"
Lamp Type	4 Watt PR base Halogen Lamp.
Light Output	28 lumens
Weight w/ Batteries	8 oz.
Run Time	5 Hrs. Halogen, 8 hrs long burn
Focus Type	Wide
On/Off	Twist Head
Material	Polycarbonate
Origin	Made in the USA