
I’ve had the Petzl Duo for a long time and it has served me pretty well. After a couple of years, they came out with the LED version, and than an LED upgrade package for the old incandescent version. I upgraded mine to have 5 LEDs.
It’s great to have two different intensity lights, and to be able to focus the halogen. The LEDs give great burn times (100 + hours with lithium batteries), while the halogen will give 6-10 hours or so. Much better than the < 3 hrs and < 12 hours I used to get with the incandescent bulb and alkalines!
There are two draw backs to this light. First, it is not really water proof, just water resistant, and my batter contacts have corroded a bit. Second, you have to wear it over your helmet when biking, while some petzl lights can fit under the helmet as they have a front mounted battery pack.
-- Sean
I’ve used the Petzl Duo for over a year now. Most of the time I prefer LED lights for their long battery life, but since I’m often the navigator, I need a halogen light for route-finding. The Duo meets both of these needs but has a few drawbacks. First of all, this light is not as comfortable as others when worn for long periods of time. By morning I’m very happy to be able to take it off. Also the halogen beam doesn’t focus as nicely as the Zoom (for instance). I assume this is due to the smaller reflector. The focus adjustment dial is supposed to allow you to change from flood to zoom, but I’ve only found one position that I consider usable.
I’ve used both the 3-LED and 8-LED modules. The 3-LED module produces sufficient light for hiking and biking on easy fireroads, but you’ll need something else if the biking gets fast or slightly technical. The 8-LED module is very nice and has 3 different power levels. The highest LED setting can almost compete with a halogen bulb for area lighting. The halogen was only needed when trying to spot distant objects.
I’m not sure of the run time in LED mode, but in constant halogen mode I only get about 5 hours using lithium batteries. In normal race conditions, one set of lithiums will usually last the entire night.
Despite its shortcomings, this is still a good light for AR. I would probably consider the newer Myo 5 if was going to buy a new light, though.
– Charlie
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