Since the Sun Jar is completely waterproof, it can be left outside to charge, and even used as a garden light. It also makes a wonderful night light for a child’s bedroom. It can be left on a windowsill to charge, but for best results it should be left in direct sunlight – either outside, or with the lid of the jar left open at an angle where the most sun possible hits it during the day. To fully charge the Sun Jar takes 5 hours of direct sunlight, and the jar will glow for a similar number of hours from a full charge getting slowly dimmer.
The light from the original Sun Jar is an orange-yellow or a similar colour and brightness of a candle. Also available now is a blue light containing Moon Jar (pictured above).
More Information about Sun Jar
Buy a Sun Jar in the UK
Make Your Own Sun Jar
The original Sun Jar was created by Tobias Wong. Since becoming a commercial product many people have put together their own Sun Jars very cheaply using easy to find components. If you are electronically minded, you can put together your own light/dark sensor circuit. Alternatively you can cannibalise a solar garden light (available in packs of 2 for £5 from many supermarkets).
It is also possible to enhance a commercial Sun Jar replacing the LEDs with brighter lights, increasing the capacity of the rechargeable battery, and/or replacing the solar panel.