LED rope light for possible darkroom applicaton

Discussion in 'Darkroom Equipment' started by Mainecoonmaniac, Nov 17, 2010.

  1. Mainecoonmaniac

    Mainecoonmaniac Subscriber

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    I found a cool vendor that sells LED rope lights. They come in various colors and lengths. I'm thinking of using the orange or red one rope lights in my darkroom as safelights. I'm wondering if you could coil them inside an enlarger head as a light source?

    Here's the link:
    http://www.orangetreetrade.com/shop/
     
  2. dehk

    dehk Member

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    Are they safe for safe light? I highly doubt that.
    But more interestingly, why do you want to coil them instead an enlarger head?
     
  3. Wade D

    Wade D Member

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    I can't find the thread but read somewhere not too long ago that someone was using amber Christmas light strings. They claimed that the strings were safe for modern papers. Cheap too.
     
  4. BetterSense

    BetterSense Member

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    The red ones are probably safe for a safelight.

    I don't think coiling them inside the enlarger will work.
     
  5. thisismyname09

    thisismyname09 Member

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    If they're LEDs they should be fine. the little bulbs in the colored glass may be a different story, though. iirc, LEDs will only give off a certain frequency of light, nothing more. the glass bulb ones are probably just regular bulbs, as in not safelights, with tinted glass over it. Unlike safelights, you don't really know how much light it filters out and at what wavelengths. it really wouldn't be much trouble to test them, though.
     
  6. pcyco

    pcyco Member

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    hallo

    i use a 1watt philips ledlightbukb, in red, as safelight.
    tested for 32 minutes -> absolut nothing with kentmere vc and some other papers (mcc etc)

    at the weekend i can look for the exact name.

    analog greetings

    thomas
     
  7. jp498

    jp498 Member

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    A common paper like Ilford MG RC Warmtone cuts off hard at 550nm

    http://www.ilfordphoto.com/download.asp?n=31&f=2006130207232634.pdf

    The red led rope light here has a 630nm peak.

    http://en.wikipedia.org/wiki/File:Red-YellowGreen-Blue_LED_spectra.png

    shows a spectrum graph of three LEDs including a red one, pretty sharp output that should not pose a problem. I think it's a matter of either testing like Thomas has done or comparing spectrum graphs before purchasing.

    http://www.orangetreetrade.com/shop/2-wire-120v-3/8-inch/50ft-rope-light-inch-p-666.html
     
  8. Mainecoonmaniac

    Mainecoonmaniac Subscriber

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    Thanks for the information

    Hi Thomas,

    Thanks for the information. I find it useful. I went through a couple of safelights already. They were old fashioned technology of incandescent bulbs and sodium vapor. I got very old Thomas Duplex that safelight that is near the end of it's life. I think the new LED technology is more energy efficient and quieter. My Thomas Duplex hums when it's on. I'll buy some orange rope lights for my darkroom soon.

    Best,
    Don
     
  9. holmburgers

    holmburgers Member

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    Safe light - probably, enlarger light - heck no. These rope lights get quite warm, and I think if you coiled them in an enlarger not only would the light be of terrible quality, it would probably melt itself into a huge gooey mess.
     
  10. pcyco

    pcyco Member

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    hallo

    there are allways possibilitys if you want
    [​IMG]

    i will try something like this.

    there are also grower-lights with leds, i think they "must" emit uv-light

    now im going home from the office an have a beer at home :smile:

    thomas
     
  11. MattKing

    MattKing Subscriber

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    One advantage of the rope lights would be that they would make it easier to illuminate your entire darkroom. There is nothing quite as frustrating as having a safelight that forces you to stand only in certain places, because otherwise you find that you are blocking the light with your own body.

    I note that the amber rope light at that "orangetree" link also features a "most beautiful and romantic warm glow". I can't say that I've ever worked in a darkroom that offered a "most beautiful and romantic warm glow" :smile:.
     
  12. Mike Wilde

    Mike Wilde Member

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    I have learned those pitfalls.

    I now tend to multiple low wattage units. Two 7.5w and one 5w in the dry/wet darkroom, and 3x 7.5w in the laundry room when I print larger than 11x14 and spill the trays out onto the washer and dryer tops.

    All usually OC, but I do have Rubylith gel filters to swap in when I want a brighter look when working with only Ortho materials.
     
  13. Shawn Dougherty

    Shawn Dougherty Member

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    I noticed that as well! Nothing says romance like orange light and the smell of stop bath.... =)
     
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  15. pcyco

    pcyco Member

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    hallo

    i also was frustrated all the time about the "darkness" but with the 1 watt i can read the newspaper while developing :smile:

    thomas
     
    Last edited by a moderator: Nov 19, 2010
  16. Jerevan

    Jerevan Subscriber

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    Pcyco,

    just remember to get back with the details about that LED light - I am interested. :smile:
     
  17. pcyco

    pcyco Member

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    hallo

    today i visit my darkroom.

    so i hope, i dont forget.

    thomas
     
  18. michaelbsc

    michaelbsc Member

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    I don\'t have a bright darkroom. I use a few small 5x7 housings that I\'ve collected cheap over the years to illuminate specific work areas and let the rest of the room be dark if the white lights are off.



    Searching the floor is a little hard if I drop something, since there\'s little illumination outside the spots. But I never worry about fogging anything.
     
    Last edited by a moderator: Nov 19, 2010
  19. Mainecoonmaniac

    Mainecoonmaniac Subscriber

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    I'm a frugal photog too

    The Thomas Duplex safelight was a salvaged from my work place. It was 10 years ago when the university started closing darkrooms at reasearch labs. I also got an Arkay tumbling print washer too.
     
  20. pcyco

    pcyco Member

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    hallo

    im back from the darkroom.

    on the ledbulb is only printed:

    philips deco led red 1 w 230-240V E9 50-60Hz

    --

    thomas
     
  21. Jerevan

    Jerevan Subscriber

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    Thanks, Pcyco! Now let's see if I can find one of these... :smile:

    Is it a E27 screw-in or does have some other configuration? I can never remember if the safelight for orthocromatic papers should be above or below 610 nm? If below, could a green LED with a spectrum of 510-540 nm work?

    But I guess dark green is even darker than red, right?
     
    Last edited by a moderator: Nov 19, 2010
  22. pcyco

    pcyco Member

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    hallo

    jerevam: i never thought about this. im a redlightarea-worker :smile:

    i tried it because a friend of mine got a strip of red lights, which he used as darkroomlight.
    it was bright as hell. you were unable to see anything of the negativeprojection on the paper.
    these times we were looking which led these were etc. but there were noch chance to find it out.
    so i tried the philips bulb.

    maybe you can talk to the guy in the shop to test serveral lamps. and give the rest back. and when they all work its brighter :D

    and lets know us which works well -> when you are testing.

    thomas

    ps.: maybe sometimes we think a little bit to much about everything before we do it.
    lets try it!!! and see whats happen. last days i made a papernegative with my plotter on transparent drawingpaper at my work.
    a strange look. athers will never try this because of this and that and they will never explore new ways. it will be much more important to write down and comment what happens and tell it to the others so they can do it also.
     
  23. Jerevan

    Jerevan Subscriber

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    Pcyco,

    I looked around at the Philips site and think I maybe found the light you are using. I'll have to go to the shop and see if I can order one to test it out.

    And yes, you are right - the only way to find out is to try. As a famous writer once wrote: "Try again. Fail again. Fail better." :smile:
     
  24. pcyco

    pcyco Member

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    hallo

    "Try again. Fail again. Fail better." great

    will you try the green one too???

    let me know when it works!!

    --

    thomas
     
  25. Irvine_Short

    Irvine_Short Member

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    Green will not work! check out the wavelength.

    Red or amber will be fine. :smile:
     
  26. Jerevan

    Jerevan Subscriber

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    Yes, I will check back as soon as I get down to it.

    As you say, Irvine, the green will not work - it was too late at night when I wrote that, that's my feeble excuse. :smile: