Beam Comparison - Headlamp


Battery Life vs. Beam Distance - the above graph shows how beam distance at the brightest setting degrades as battery life runs down. We use the ANSI FL-1 battery run-time spec, which says run-time for the high mode is finished when brightness degrades 90% from its initial value. The ANSI standard is more stringent than what headlamp manufacturers use. They consider high mode run-time still OK so long as there's enough battery to produce light as bright as a candle placed 2 meters away (0.25 lux). We think the manufacturer's approach is deceptive and misleads consumers to believe the high output mode produces a long-distance beam much longer than it actually does.

                                       Petzl NAO: we measured the maximum beam distance as 113 meters and the ANSI battery run time for the high setting as 2 hours.
                                       Black Diamond Icon: we measured the maximum beam distance as 82 meters and the ANSI battery run time for the high setting as 9.4 hours.

Side-by-Side Comparison


Rank #2 #1
Product
Petzl NAO
Petzl NAO
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Black Diamond Icon
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Awards     
Price $149.95 at Amazon$74.96 at Backcountry
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Overall Score 
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65
100
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68
Star Rating
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Pros Perfect 10s for trail finding and close proximity, cool technology, charge off any usb plugBright, wide spotlight, clear/smooth optics, long battery life, robust design
Cons Abysmal battery life, reactive lighting can be as annoying as usefulHeavy, bulky, and expensive
Weighted Metrics Petzl NAO Black Diamond Icon
Trail Finding - 20%
10
0
10
10
0
9
Close Proximity - 15%
10
0
5
10
0
6
Battery Life - 15%
10
0
4
10
0
8
Brightness - 25%
10
0
9
10
0
7
Weight - 15%
10
0
3
10
0
2
Ease Of Use - 10%
10
0
4
10
0
8
Product Specs Petzl NAO Black Diamond Icon
Measured Max Beam Distance 113 m 82 m
Claimed Distance 135 m 100 m
Measured High Mode Run-time (ANSI) 2 hrs 9.4 hrs
Claimed High Mode Run-time 8 hrs 75 hrs
Claimed Low Mode Run-time 12.5 hrs 175 hrs
Weight 190 g, 6.7 oz 232 g, 8.2 oz
Battery Type Proprietary Rechargeable or 2 AAA 4 AA
Water Resistance IPX 4 (splash proof) IPX 7 (waterproof to 1m)
Manuf Claimed Lumens 575 lumens 320 lumens
Beam Type Flood/Spot Flood/Spot
Red Light no Yes
On/Off Switch Lock Yes Yes