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Author Topic: How to turn a 240v fluorescent light into a 12v light?  (Read 1668 times)
Server_Room
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« on: July 12, 2011, 12:03:35 PM »

Ok I was told by a Friend that you can change a 240v fluorescent light (strip lights) into 12v lights by removing certain parts from inside them.This would be great because my solar powered shed runs on 12v and I could just run it straight from the battery

How and is this possible and what parts can I remove to make this happen
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billrussell42
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« Reply #1 on: July 12, 2011, 12:30:20 PM »

Strip light is a lot different from fluorescent light.

No, you can't "remove some parts" and make a fluorescent light operate on 12 VDC. But you can get an inverter that converts 12 VDC to 240 VAC for not much money.

.
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Ray_mond
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« Reply #2 on: July 12, 2011, 12:55:03 PM »

Billruss is correct. Florescent tubes need about 80 volts to light, more to get them started lighting.  Extra bright LEDs however run on about 3.5 volts, so 4 of them in series light nicely on 13 volts. 6 or 7  LEDs and a 470 ohm resistor (1/4 watt or more) may be a better choice, for older LEDs. You can reduce the resistance to get optimum brightness, but don't get greedy or your LEDs will die in less than one second. Older, less bright LEDs can only tolerate about 2 volts and are not very predicable, even from the same batch. The long strings of Christmas LEDs are quite well matched and are a good buy considering the socket with sturdy leads and the light diffuser. White and a slight blue tint are available.
Edit: Those are good points Brian, but very low voltage is not very specific. Arcs can be as low as 12 volts, but modern florescent aren't designed for arc mode. The German submarines of WW2 likely had more than 100 volts dc available.  Neil
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Brian_T
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« Reply #3 on: July 12, 2011, 02:29:47 PM »

Once you get a fluorescent bulb lit, they run on very few current limited volts. In WWII the Germans used fluorescents in submarines. Once they kicked them into operation, they looked at the voltage available and adjusted the series limiting resistors to keep from blowing the bulbs. The easiest way to do this is from an inverter and make use of the modern ballast.
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natakhansk
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« Reply #4 on: September 20, 2011, 08:06:57 PM »

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