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Footcandles....

This is a discussion on Footcandles.... within the Semi Hydro / Lights / Greenhouses / Accessories forums, part of the Orchid Culture category; Ok, so now I have a light meter. LOL And, I'm fascinated with the vast ...

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  1. #1
    mtequine's Avatar
    mtequine is offline Senior Member
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    Default Footcandles....

    Ok, so now I have a light meter. LOL And, I'm fascinated with the vast difference in readings I'm getting between yesterday (cloudy and snowing) and today (sun shining). !!!

    So....I have it on the sun/HID setting (vs fluorescent). It's an Environmental Concepts brand And, it looks like the plants in my two open (no trees blocking light) south windows it's ranging between 5000-6500 fc (mid-morning to noon).

    The blocked south window is reading 2500-4000fc and my sad little west window (facing a house) is 800 fc.

    So, am I looking at high-med and low light situations? Is the low light too low for phals and paphs? Cause that's what is sitting there.

    Remember this is a new house for me, only been here since the first week in December so I don't have a real good feel for how the plants are going to do.

    Thanks!

  2. #2
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    that's plently of light on your south window. Your west window will be best for paphs and phals. It can be possible for minicatts I suppose, correct me on this, I've bloomed catts on poor windows but they aren't the best

  3. #3
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    Minicatts need the high light. Watch the light in that west window during the summer months as the suns position changes!!!

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    Jenny, if you wanted to be scientific about it, you'd measure the light at different times of the day from sun up to down, on sunny days, partially cloudy, and rainy days. From that you could work out a weighted average for the amount of total sunlight your plants would be getting from your different locations. Diane's right, too - it will change seasonally.

    Lower light works, to a point, if delivered over a longer period of time (in practice when growing under lights.)

    Notice how quickly the light falls off as you move in from the window. The light meter is a good tool to get you thinking about all of this. But reading your orchids and how they respond to their placement is still the most accurate measure of their happiness!

    McJulie

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    Thanks guys...good info. You're right Julie, I do need to let the plants tell me. I guess its the geeky science knowledge part of me that wants to know more about exact numbers.

  6. #6
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    I haven't gotten to check that often to see if it's that range for 8 hours...boy, I don't know...maybe? There is a house right next door on that side and it's pretty dark.

    However, I'm used to growing them in an partially shaded east window in a much brighter room...so I may just be jaded.

    Plus, as the days get longer, I suspect that can only help!

  7. #7
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    For now I would put the low light plants to the side of the brighter window. You have more control there.

    What time of day was the 800 measured? If you measure it at he height of the day you will know it is less than that the rest of the day.

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