Black Diamond
Black Diamond Storm 550 (550 lumens)
- Brightness: 7/10 How much light it gives at full power, for finding your way in the dark.
- Runtime: 10/10 How long one charge or set of batteries lasts at a level you can walk and cook by.
- Weight: 5/10 How much it adds to your pack and your head.
Wet UK trips: IP67 is waterproof to 1 m for 30 minutes and dustproof
- Brightness
- 550 lumens (FL1)
- Runtime
- 13 h at 200 lumens
- Weight
- 102 g
- Power
- Rechargeable
- Water rating
- IPX7
Where to buy
Rock+Run £49.50 In stock. Delivery £5.50. Sale price (was £55). In stock with Add to cart on 2026-10-20; it showed out of stock the day before. £5.50 standard under £100, free from £100.
View at shop: Rock+RunGO Outdoors £65 In stock. Delivery £3.99. Free standard delivery on orders £80+.
View at shop: GO OutdoorsBlacks £65 In stock. Delivery £4.99. Free delivery over £95, £4.99 under that (Blacks' product page).
View at shop: BlacksBlack Diamond (UK store) £65 In stock. Delivery £10. Black Diamond's own UK store and UK list price. Black, Octane and Tundra in stock. Free delivery over £150. The page also says 'Out of Stock', but 'Add to bag' is shown.
View at shop: Black Diamond (UK store)Prices checked 8 Nov 2026 on each shop's own page; shops can change them. We earn no commission on these links; shops are listed by price. More
Our ratings (out of 10)
1 to 10, compared with the whole market. Each says what it's based on. How we score
Brightness
From maker's figures 7/10How much light it gives at full power, for finding your way in the dark. 7: Better than most.
550 lumens at full power, from the ANSI FL-1 table in Black Diamond's instruction sheet: the 500–799 band. The sheet gives 4 hours at this level.
Runtime
From maker's figures 10/10How long one charge or set of batteries lasts at a level you can walk and cook by. 10: The best you can buy for this.
Black Diamond's instruction sheet (linked from its product page) gives 13 hours on Medium (200 lumens), the longest it gives for a mode of 80 lumens or more: the 10 h+ band. High (550 lumens) lasts 4 hours. The product pages show only 70 hours, which is the 35-lumen Low mode.
Weight
From maker's figures 5/10How much it adds to your pack and your head. 5: Does the job. Average for wild-camping gear.
Black Diamond lists 102 g (product page and instruction sheet agree) for a lamp with a built-in battery, in the 90–109 g band. GO Outdoors, Rock+Run and Black Diamond all give 102 g.
In short
Good for
- Wet UK trips: IP67 is waterproof to 1 m for 30 minutes and dustproof
- Winter and hill days where a 550-lumen flood and spot lamp helps (Black Diamond's figure)
- Hikers who want red, green and blue night modes and big buttons they can press in gloves
Strengths
- 550 lumens (ANSI FL-1 figure in the instruction sheet) with flood, spot and RGB lenses
- 13 hours at 200 lumens and 4 hours at 550 lumens (Black Diamond's figures)
- IP67: waterproof and dustproof, tested to 1 m for 30 minutes
- USB-C charging with pass-through and a serviceable 1800 mAh battery
- Two oversized buttons, mode memory and a digital lock
- 3-year Black Diamond warranty
Weaknesses
- New for 2026: no independent review of this version yet, so comfort and beam are estimates, not reviewed scores
- Short at full power: 4 hours at 550 lumens (Black Diamond's figure)
- No AAA backup: it runs on the built-in rechargeable battery only
Sources
We haven't tested this ourselves. Every score comes from these specs, tests and reviews.