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.

                                       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.
                                       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 #1 #2
Product
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
Black Diamond Icon
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Awards  Editors' Choice Award   
Price $29.51 at Amazon$74.96 at Backcountry
Compare at 4 sellers
Overall Score 
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72
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68
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Pros Incredible brightness and beam control, great valueBright, wide spotlight, clear/smooth optics, long battery life, robust design
Cons Short battery lifeHeavy, bulky, and expensive
Bottom Line This model won't break the bank and you'll get a strong beam that can be easily adjusted, despite a shorter battery life.Very bright with a wide beam, this model is bulky and heavy with an even heavier price tag.
Weighted Metrics Coast HL7 Black Diamond Icon
Trail Finding - 20%
10
0
8
10
0
9
Close Proximity - 15%
10
0
8
10
0
6
Battery Life - 15%
10
0
5
10
0
8
Brightness - 25%
10
0
9
10
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7
Weight - 15%
10
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4
10
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2
Ease Of Use - 10%
10
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8
10
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8
Product Specs Coast HL7 Black Diamond Icon
Measured Max Beam Distance 131 m 82 m
Claimed Distance 152 m 100 m
Measured High Mode Run-time (ANSI) 3.4 hrs 9.4 hrs
Claimed High Mode Run-time 3.8 hrs 75 hrs
Claimed Low Mode Run-time 80 hrs 175 hrs
Weight 128 g, 4.5 oz 232 g, 8.2 oz
Battery Type 3 AAA 4 AA
Water Resistance Water-resistant IPX 7 (waterproof to 1m)
Manuf Claimed Lumens 196 lumens 320 lumens
Beam Type Flood Flood/Spot
Red Light no Yes
On/Off Switch Lock No Yes