Fluorescent tubes use far less energy than incandescent lamps and
fluorescent tubes last a great deal longer as well. Other advantages are
diffuse, glare-free lighting and low heat output. For these reasons,
fluorescent lighting is the natural choice in commercial and retail
buildings, workshops and factories. For battery-powered lighting,
fluorescent lights are also the first choice because of their high
efficiency. The main drawback with running fluorescent lights from
battery power is that an inverter is required to drive the tubes.
Circuit diagram:
Inverter efficiency then becomes the major issue. There are many commercial 12V-operated fluorescent lamps available which use 15W and 20W tubes. However, it is rare to see one which drives them to full brilliance. For example, a typical commercial dual 20W fluorescent lamp operating from 12V draws 980mA or 11.8W. Ignoring losses in the fluorescent tube driver itself, it means that each tube is only supplied with 5.9W of power which is considerably less than their 20W rating. So while the lamps do use 20W tubes, the light output is well below par.
Warning:
This circuit generates in excess of 300V DC which could be lethal. Construction should only be attempted by those experienced with mains-level voltages and safety procedures
Circuit diagram:
12V Fluorescent Lamp Inverter Circuit Diagram
Fig.1: two switch-mode circuits
are involved here: the DC-DC inverter involving IC1, Q1 & Q2 and
the fluoro tube driver which converts high voltage DC to AC via IC3 and
Q3 & Q4 in a totem-pole circuit.
Inverter efficiency then becomes the major issue. There are many commercial 12V-operated fluorescent lamps available which use 15W and 20W tubes. However, it is rare to see one which drives them to full brilliance. For example, a typical commercial dual 20W fluorescent lamp operating from 12V draws 980mA or 11.8W. Ignoring losses in the fluorescent tube driver itself, it means that each tube is only supplied with 5.9W of power which is considerably less than their 20W rating. So while the lamps do use 20W tubes, the light output is well below par.
Warning:
This circuit generates in excess of 300V DC which could be lethal. Construction should only be attempted by those experienced with mains-level voltages and safety procedures
******Related Topic ******
- 3V to 9V DC Converters
- 1.5V Battery to 5V Voltage Converter
- Simple UPS
- Mini High-Voltage Generator
- 555 timer IC Inverter circuit schematic 12V to 220V
- Simple Inverter
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