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  • 1 Post By MICKEY
  • 1 Post By chemist

convereting f stop and shutter speed to lumen

This is a discussion on convereting f stop and shutter speed to lumen within the Semi Hydro / Lights / Greenhouses / Accessories forums, part of the Orchid Culture category; I have sen converters to do this but cant find one now I don't have ...

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  1. #1
    MICKEY's Avatar
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    Post convereting f stop and shutter speed to lumen

    I have sen converters to do this but cant find one now I don't have a
    light meter but I have a dslr I put a white background at plant level and took a picture of it
    iso 800 f 5.6 250sec Name:  DSC08299.JPG
Views: 188
Size:  55.4 KBName:  DSC08293.JPG
Views: 177
Size:  108.6 KB

    this is using 2 t12 cool white tubes and 10 watt led red and blue only

  2. #2
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    chemist is offline Senior Member
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    If you have smart phone you can download app to mesure lumens/lux. And no converting needed

  3. #3
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    78Terp is offline An Avant Gardner
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    Svetlana-
    Thanks for the tip! I never even thought about a smart phone app for a light meter existed.

  4. #4
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    no smart phone mine is dumb

  5. #5
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    You are welcome Harvey!
    I would not think so too , i even found stud finder but did not use that one yet.
    Posted via Mobile Device

    ---------- Post Merged at 12:00 PM ----------

    Quote Originally Posted by MICKEY View Post
    no smart phone mine is dumb
    Do you have tablet?!

    I think there are some video on YouTube how to use old fashion cameras to determine lumen/lux. I dont have one so i could not try.

  6. #6
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  7. #7
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    Quote Originally Posted by MICKEY View Post
    Great you found info you were looking for!

    I grow my vanda under light , i thought it will be easier for tou to compare. I have 4' 4 bulbs light fixture and its enough for my vanda to bloom. I water it everyday in morning and than in evening if i dont forget. Its doing fine. And buds getting bigger each day now.

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