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Simpleclock is an easy to assemble attractive 4-digit 7-segment LED display clock with temperature and alarm function. It is available in three display colors: Red, Blue and White. It comes as a kit of through-the-hole parts and can be soldered by any person with basic soldering experience. An attractive acrylic stand is included. [ ]

Fluorescent lamp assembly using only a 3V voltage source. 2 battery which i parallel to supply its circuit of fluorescent lamp . By using the above circuit is very useful if it saves electricity and power outages at home , or used in  a dark place. Circuit of works, and lamp lights This is circuit , battery , and fluorescent lamp 20W Working circuit on the dark Interest with this circuit : Fish Caller Electronics