Both head-torches are working with old-style bulbs (NOT LED).

Petzl Zoom Incandescent Water Resistant Focusing Hiking Camping Head Lamp

PETZL Water-Resistant Incandescent Head Lamp.

Focusing headlamp with adjustable elastic head bands.

Comes with extra bulb in storage holder.

Batteries are NOT included.

Easily upgradable to LED, below is a description of which bulb can be used:

PETZL Zoom/Duo MES E10 Screw LED Bulb, CREE UPGRADE LAMP Head Torch

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