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Old 03-08-2014, 06:01 PM   #11
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Originally Posted by gbaglo View Post
Not sure if it's the same as CFL, but I had a battery operated fluorescent camp lamp for the tent trailer. Couldn't listen to AM radio while it was turned on because it emitted a very annoying signal which was picked up and amplified by the radio.
I had something like that (mine used 4 AA batteries and had a 4" fluorescent tube). In the pre-LED era, was very efficient. I don't recall using a radio around it.

I replaced the stock middle-of-ceiling fixture in our Boler with a 12VDC fluorescent fixture. We have sometimes used a radio in the Boler, with no problems.

Our big stickie 5th wheel came with 12V fluorescents in the kitchen and living areas. We haven't noticed any interference.

The 12VDC CFL will be essentially the same as the 120VAC CFL - both need to make much higher starting voltage than the input supply, so they should behave similarly. Our portable units presumably just used the cheapest possible electronics.

An LED unit would certainly be preferable - there is just very little demand for medium screw base 12V lights.
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Old 03-08-2014, 06:17 PM   #12
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Quote:
- there is just very little demand for medium screw base 12V lights.
As solar prices come down more people will build vacation homes with solar. Then perhaps the demand for 12 volt appliances will increase.
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Old 03-08-2014, 07:07 PM   #13
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As solar prices come down more people will build vacation homes with solar. Then perhaps the demand for 12 volt appliances will increase.
I think RVs will be a much more common market for a long time, but this would be another one. I hope no one plans on using medium screw base fixtures for 12VDC in a routine way - the potential for destructive errors - putting the wrong type of bulb in - is high and unnecessary.

The generally better idea is to use light fixtures which have sockets for which 12VDC is normal, but for a nice inexpensive lamp, this mix-and-match scheme can be handy.
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Old 03-08-2014, 07:23 PM   #14
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We have nice little battery operated table lamp from lee valley that seems
Like it will work well
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Old 03-08-2014, 09:16 PM   #15
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We have nice little battery operated table lamp from lee valley that seems
Like it will work well
We tend to use battery operated lamps as well. I've been looking for one for the dinette and there are lots to choose from. This one looked especially appealing: Fulcrum 20020-108 8 LED Sensor Table Lamp, White - Amazon.com
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Old 03-09-2014, 08:35 AM   #16
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I like the idea of a battery operated lamp. Just use good rechargeables, and maybe get a 12V battery charger if gone for a while. Nice a flexible for outdoor use at picnic tables too.
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Old 03-09-2014, 08:47 AM   #17
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Way to go Tim, now you have me thinking about this WAY too much.

How about if you were to do what Tim described with the bulb, and fixed a battery pack (8 AA) into the base somehow, and make the lamp cordless?

Click for link.
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Old 03-09-2014, 09:07 AM   #18
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How sensitive are your particular LEDs to voltage? Most rechargeables are 1.2V, so you only get 9.6V out of 8 of the, rather than the 12V out of 8 non-rechargeables. It might work fine with 8, or you might need an extra pair of cells in the series.
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Old 03-09-2014, 09:22 AM   #19
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Just remember, once a year, similar to today and Daylight Saving time adjust, pull out those batteries. They tend to leak after awhile and can destroy the item. I got one of these, it can plug into your computer or on board 12v plug and clip to your table for some down light effect.
Daffodil ULT300 USB Light - Reading Lamp with 28 Bright LED Bulbs, Flexible Gooseneck and Desk Clamp / Plugs into Your PC or Mac's USB Port to Light-up its Keyboard and Screen. No Batteries Needed - Amazon.com
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Old 03-09-2014, 09:32 AM   #20
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I can't imagine that it would have an adverse affect using rechargeables, but not certain myself. I use them all the time in my devices with no ill effect. I do see lots of lights are rated for 10-30 volts, so they obviously work over a wide spectrum of voltages.

Maybe it would be just a bit dimmer? I know my headlamps I use when touring the backcountry don't seem to suffer from using rechargeables.
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