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.
                                       Coast HL7: we measured the maximum beam distance as 131 meters and the ANSI battery run time for the high setting as 3.4 hours.

Side-by-Side Comparison


Rank #2 #1
Product
Petzl NAO
Petzl NAO
Read the Review
Winner of our Editors' Choice award  the Coast HL7 impressed us with a combination of high-power beam  great close-proximity lighting  relatively light weight  and low-price.
Coast HL7
Read the Review
Awards    Editors' Choice Award 
Price $149.95 at Amazon$29.53 at Amazon
Overall Score 
100
0
65
100
0
72
Star Rating
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  • 5
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Pros Perfect 10s for trail finding and close proximity, cool technology, charge off any usb plugIncredible brightness and beam control, great value
Cons Abysmal battery life, reactive lighting can be as annoying as usefulShort battery life
Weighted Metrics Petzl NAO Coast HL7
Trail Finding - 20%
10
0
10
10
0
8
Close Proximity - 15%
10
0
5
10
0
8
Battery Life - 15%
10
0
4
10
0
5
Brightness - 25%
10
0
9
10
0
9
Weight - 15%
10
0
3
10
0
4
Ease Of Use - 10%
10
0
4
10
0
8
Product Specs Petzl NAO Coast HL7
Measured Max Beam Distance 113 m 131 m
Claimed Distance 135 m 152 m
Measured High Mode Run-time (ANSI) 2 hrs 3.4 hrs
Claimed High Mode Run-time 8 hrs 3.8 hrs
Claimed Low Mode Run-time 12.5 hrs 80 hrs
Weight 190 g, 6.7 oz 128 g, 4.5 oz
Battery Type Proprietary Rechargeable or 2 AAA 3 AAA
Water Resistance IPX 4 (splash proof) Water-resistant
Manuf Claimed Lumens 575 lumens 196 lumens
Beam Type Flood/Spot Flood
Red Light no no
On/Off Switch Lock Yes No