25 Sep '16, 1am
This Brilliant SALt lamp runs 8 hours on just 1 glass of salty water
The article's title is misleading and verges on magical thinking. Basically, this lamp ships with half a battery, the second half is salt water, the first half an unspecified electrode (likely a zinc alloy). The power comes from a reaction between salt and the electrode- an anode and cathode just like in any battery. No free lunch. When the metal electrode wears out, the lamp stops working. It would be ethical for the proponents to indicate how much energy is used to produce these electrodes, vs the amount of light delivered. As a portable light source that is easy to ship because the heavy part of the battery (salt water) is locally sourced, it may find a niche. But I bet 90% of your readers think that salt water alone is the power source, a huge misconception bordering on deception.