Both head-torches are working with old-style bulbs (NOT LED).
PETZL Water-Resistant Incandescent Head Lamp.
Focusing headlamp with adjustable elastic head bands.
Comes with extra bulb in storage holder.
Batteries are NOT included.
New improved 130 Lumen Cree XP-G2 S4 LED Upgrade in E10 MES Screw Bulb Base
Universal interchangeable fitting between 2v to 9v; e.g. 3v, 4.5v, 6v 7.2/5v & 9v
Versatile: use in equipment with 2, 3, 4, 5 or 6 AAA, AA, C or D cell alkaline & rechargeable or 3LR12 batteries & Sealed Lead Acid batteries - Voltage range: 2v to 9v
1 Watt Lifetime LED Bulb gives you much longer battery life!
Produces a much brighter light than incandescent Krypton//Xenon/Halogen bulbs
Fits many Petzl and other Head Torches, Bike Lights, most equipment with E10 MES screw bulb bases
Fits the following Petzl Head Torches:
Arctic & Arctic Clip, Chrono, Duo, Micro, Mega, Megabelt, Mega Belt Clip, Saxo.
Zoom & Zoom ADP series headlamps