[pure-silver] Re: Now this realy an Off Topic question..

  • From: titrisol <titrisol@xxxxxxxxx>
  • To: pure-silver@xxxxxxxxxxxxx
  • Date: Thu, 26 Nov 2009 03:54:53 -0800 (PST)

You can find LEDs for 12V in Conrad.nl or similar
those should be economical and your battery should last for a while.
Such as:  852149-8A
   
    

    LED-Gloeilamp T10 12V Rood  

--- On Thu, 11/26/09, Jean-David Beyer <jeandavid8@xxxxxxxxxxx> wrote:

From: Jean-David Beyer <jeandavid8@xxxxxxxxxxx>
Subject: [pure-silver] Re: Now this realy an Off Topic question..
To: pure-silver@xxxxxxxxxxxxx
Date: Thursday, November 26, 2009, 12:28 PM

C.Breukel@xxxxxxx wrote:
> I have this really off topic question, there is a faint connection to
> pure silver though..;-)..
> 
> Since a year or so I am quite heavy into wet plate collodion
> photography, I'll spare you the details, but basically you prepare and
> process a light sensitive plate with silver halides (see pure
> silver..;-)..) in the field.
> 
> After exposure plates have to be developed immediately, so you need a
> what is called a darkbox. Since the emulsion is only sensitive to blue
> and a bit of green light you can work under red light. I am building
> this box in my car.
> 
> Now my question is: how long can you run a low wattage (red) bulb from
> your car battery before you drain said battery and are unable to start
> the car again?
> 
If you use some red LEDs, enough so you can see what you are doing, I imagine 
whatever power source you use will last longer than if you use an incandescent 
bulb.

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