First - the computer. Vyper is a dive computer made by Suunto since 1999 so it's a mature design. It allows for diving with air, nitrox up to 50% PPO and can also be used as a depth gauge/timer during deeper dives. A diving computer is a very convenient thing, integrates the three meters you need underwater (depth gauge, timer and thermometer) into one device. A diving computer also allows you to extend your NDL (as compared to tables) becuase it traces the exact profile of your dive (no rounding up the depths nor times), and adjusts the NDLs in real time (Vyper is using Reduced Gradient Bubble Model, RGBM) Planning a dive is also much easier - you don't need the tables and you don't need to write down your diving profiles - the computer does that for you. That said, a computer can fail so you still should bring backup for your dives: a timer, a depth gauge and tables...
As for the canister light we bought, the AZON (abbreviation for Autonomiczny Zestaw Oświetleniowy Nurka which translates to Autonomous Diver Light System), it's a fairly good canister LED lamp whith a Goodman handle, made by a Polish diver. It uses 12 AA cells, instead of one acumulator, which are kept in a construction plastic container. These cells should last for at least 90 minutes, though I haven't tested it yet for that long. The light is quite strong (1400 lumens though somewhat dispersed as compared to HID lamps. Charging 12 AA cells is not as easy as charging one big acu, but, and this is the biggest advantage, the price of the lamp is one fourth the price of the cheapest canister lights available elswhere!. The weight of the lamp is very small - only 1kg on the surface and 0,4kg underwater (that's because it doesn't use one big acu and is made of plastic).We are extremely safisfied with this lamp:):)
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