![]() This means at least 10x longer battery operation before discharge. With typical consumption of 1.1W (boats up to 12m) or 2W (boats above 12m) it is at least 10x more efficient as 10W / 21W incandescent bulb that is normally used for this purpose. Built-in regulator ensures the same brightness regardless of the supply voltage and therefor permanent high visibility and added security during sailing or docked. Supply voltage range extends from 9V to 30V DC and covers complete voltage range of a 12V / 24V battery, from completely discharged to fully charged. ![]() Its built-in electronic regulator ensures constant brightness independent of supply voltage. FIREFLY LED bulb uses ultra-bright white LED diodes (LED - Light Emitting Diode) as a light source. Besides small consumption several other demands had to be met - high visibility (at least 2 nautical miles for boats up to 12m and 4 nautical miles for boats above 12m), changes of supply voltage (12V battery voltage varies between 10V and 14V, 24V batterz voltage varies between 20V and 28V), as well as safety and reliability of LED bulb operation. Primary goal was to replace the 12V or 24V classic bulb in navigation and anchor lights that are used on boats without electrical generator, where there are constraints on energy consumption. FIREFLY LED bulb White navigation and anchor light Nov 2005 General Description FIREFLY LED bulb was developed as a replacement for classic incandescent bulb where the key factor is economic use of electric energy.
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