CustomDUO LED Modules offer a significant upgrade for the Petzl Duo, replacing standard halogen bulbs and Petzl 5-14 LED clusters. CustomDUO modules are super reliable, and are very easy to fit in any original (pre 2018) Duo.
The original Petzl Duo was produced from the late 1990s, principally as a helmet mounted caving lamp, before high power LEDs were widely available. The original Duo is without doubt the most widely used caving lamp. Other than the lack of light output and run time from the original bulbs, the Duo has proven extremely fit for purpose, with a comfortable 5m depth rating (will handle deeper !!). The Duo is suitably robust, typically withstanding a good few years of gnarly caving. It is easy to operate, having a caver friendly switch, is light weight and seats very well when helmet mounted. The battery box is easily opened, and is practical, using low cost, widely available AA batteries, which can withstand significant mistreatment when carrying spares.
Since 2009, CustomDUO have manufactured a flexible range of LED modules to meet individual needs, including our best selling 'Omni' modules (Omni v5 and Omni 'Simple'). CustomDUO modules are without doubt the brightest, and most effective retrofit LED upgrades available for the Duo, featuring practical power settings and user friendly operation, developed specifically for cavers. CustomDUO modules use the latest high power LEDs, significantly increasing light output and run time. Plenty of both for even the most pushing of caving trips. Incidentally, the very first LED conversions for the Petzl Duo were constructed by innovative French cavers (not Petzl). These conversions incorporated a number of Nichia LEDs (5 - 8 from memory), and looked very similar to the Petzl modu'led 5 which they pre-dated. These were available from Expe in the Vercor as early as summer 2000, at least that is when we first recall seeing them.
With a CustomDUO LED upgrade, (and decent quality low self discharge NiMh AA batteries), the original pre 2018 Petzl Duo has established itself as the outstanding low-mid cost helmet mounted caving lamp. A great choice for novices and serious expedition cavers alike.
The original pre 2018 Duo is now discontinued. However, new stock is available and can still be purchased through specialist caving equipment retailers, and on line sources. Due to it's upgradeable design and suitability for caving, astute retailers bagged surplus stock from Petzl, prior to launch of the industrial workplace orientated Duo models (Duo Z and Duo S). CustomDUO LED upgrade modules work with all original pre 2018 Petzl Duos.