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Prism 550high powered head torch

Super-powered waterproof 550 lumen regulated aluminium Cree LED head torch. The strength and power to illuminate life at night

Prism 550 high powered head torch

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When you absolutely, positively, got to see every lock, stock and barrel in sight; accept no substitutes.

Prism 550 is a monster of a headtorch- but a friendly, agile sort of monster. With 550 lumens of superpowers, Prism 550 will be guaranteed to illuminate everything within its 135 m range. The aluminium construction gives Prism 550 tremendous durability and is rated to IPX7 waterproofing, so it will endure accidental submersion. The top headstrap and soft rubber head plate will keep Prism 550 securely in place. This combination makes Prism 550 great for trail runners, kayakers, mountaineers and climbers.

Prism 550 has a projection angle with free 180° movement and a burn time of up to 60 hours. Weighing only 153 g, Prism 550 is a comfortable 77 mm in length- meaning that it will fit neatly in your coat pocket, ready for use. 

There are 5 modes of operation on Prism 550: max (550 lumens); high (250 lumens); medium (100 lumens); low (25 lumens) and 8 Hz flashing. There is also a lock mode to prevent accidental battery drainage. 

Key features
  • 550 lumen XM-L Cree white LED
  • Aluminium body with rubber head plate
  • Durable- high impact and corrosion resistance
  • IPX7 - temporary submersion to 1 m
  • Weight: 153 g
  • Size: 77 x 46 x 61 mm
  • Battery: 2 x 3V CR123A lithium batteries (included)
  • Regulated circuit
  • Compatible with 3v Lithium Ion rechargeable CR123A batteries
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Vital stats
Vital Stats

Burn Time (max 500 lumens): 3 hrs 30 mins
Burn Time (high 250 lumens): 4 hrs 30 mins
Burn Time (medium 100 lumens): 12 hrs
Burn Time (low 25 lumens): 60 hrs
Flashing: 17 hrs

Origin: China

Prism 550 is not compatible with 18650 batteries as they are slightly smaller and of lower voltage than the 6V CR123A batteries. Prism 550 can be used with rechargable CR123A batteries.

Same day despatch

All orders received before 2pm despatched same day.

Free UK Shipping on all orders

Free 2 day delivery to UK addresses is included in all orders so the price you see is the price you pay. Upgrade to next day 1pm at the checkout.

Free No hassle 123 day returns

Buy with confidence and if you are not happy, change your mind or want a swap for any reason then return it for free and we will exchange or refund no question. The price you see is the price you pay. Just return the kit as you receive it - in its original condition, unused, unworn, with original packaging and fit for resale.

Alpine Bond

If one of our products does not meet your expectations upon delivery or, if it does not live up to the demands placed upon it, please return it within 3 years of purchase for repair, replacement or refund. If the problem is our fault then we will do this to your satisfaction if it’s your fault then we will help out the best we can.

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1 Reviews


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Mike Griffiths Outdoors
"Agile monster" indeed

I've trialled Petzls etc but could never seem to find what I wanted: simple and robust design and construction; light enough to use easily but with a massive output. This is it. Used it on ML assessment this year and during night navigation I was asked to turn it down/off cos it was making things are bit too easy! The only drawback is the fact it requires two CR123 batteries. They're not readily available in the usual retail outlets; cost a fortune if you can source them; and chargers and rechargeable batteries are like hen's teeth. But is that enough to drop a star from a five star review? Possibly half a star, but let's not be curmudgeonly. If you want a serious, powerful, robust and reliable headtorch for the hills (one that I'd be happy to pay twice the price for) then this is it. Don't hesitate - order now!


Prism One of the best Waterproof Head Torches for Running

Prism takes the muddy race test

Waterproof, value for money and lighting output rolled into one package. Well worth consideration for obstacle racing. Great Value Powerful and Submersible Head Torch for Night Time OCRs

Muddy Race

Muddy Race November 2015 - Muddy Race