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02-10-2014, 05:50 PM
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Join Date: Mar 2013
Location: Southern Louisiana
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If you are a serious orchid grower and..
If you are a serious orchid grower and do not already own a digital light meter. Please go purchase one. The hydrofarm meters are like $40 off amazon. I just received mine today and it was a very enlightening experience. An essential tool in the growers arsenal! ![Waving](https://www.orchidboard.com/community/images/smilies/thumb_wave.gif)
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02-10-2014, 08:43 PM
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Join Date: Feb 2011
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Location: Kansas
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Heck, I'd second that conclusion, even if one isn't nearly that serious.
'tis amazing, what a little light-o-meter can bring to one's reality, isn't it? ![Wink](https://www.orchidboard.com/community/images/smilies/icon_wink.gif)
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02-10-2014, 08:58 PM
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Join Date: Jan 2014
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Location: Connecticut
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I concur about the use of a light meter! I recently bought the hydrofarm analog light meter and have been having good luck with it. It definitely has answered a lot of my lighting questions.
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02-10-2014, 10:29 PM
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Light meter smartphone apps are free or $1-2. I have two on my BlackBerry, and they concur pretty well. All current smartphone platforms have them.
Two other devices you should buy are a pH meter and a TDS meter. Adequate models cost $10-15 each on Amazon, and smartphones haven't progressed quite this far yet. Your water quality and fertilizing practices will be eye-openers.
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02-11-2014, 04:34 AM
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You can also use cameras and the EXIF data on your digital pictures to work this out, particularly if you take a picture of a "neutral" coloured object.
Orchids on a Balcony: New Gadget: Light Meter
I collected some common foot candle requirements for orchids on that post.
There are free apps too, but I don't find they're as accurate as cameras.
The formula to work out foot candles from a camera is:
6*F^2/(I*E)
where F = F stop (aperture)
I = ISO setting
E = Shutter Speed (exposure)
Last edited by Discus; 02-11-2014 at 04:37 AM..
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02-11-2014, 08:06 AM
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Join Date: Feb 2014
Location: Uppsala
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I've seen a lot of free light meter apps for Iphone.
But I don't have any analog/digital light meter to test the accuracy of them.
Maybe one of you could try them out and compare them to the real light meter results?
Oskar
Last edited by Oskar; 02-11-2014 at 08:17 AM..
Reason: Type-o
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02-11-2014, 11:10 AM
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I got a nice light meter from where I work for $4. It was a discontinued item I found in the back warehouse.
---------- Post added at 09:10 AM ---------- Previous post was at 09:09 AM ----------
I'll compare an app with the meter today.
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02-11-2014, 08:00 PM
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Join Date: Aug 2013
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It is not that I am cheap, but I am a professional substitute teacher, and I found one at 1000bulbs for as low as 19.67 US dollars. (In the USA, I guess). Anologue.
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02-11-2014, 10:39 PM
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I admit, I never intend to get one. I have always grown plants in the windows so, with orchids, I can pretty much figure out what light I can give them where. However, if you have doubts about your lighting, it seems as though it would be a great idea.
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02-11-2014, 11:40 PM
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Join Date: Jan 2010
Location: Singapore
Posts: 254
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Quote:
Originally Posted by Discus
You can also use cameras and the EXIF data on your digital pictures to work this out, particularly if you take a picture of a "neutral" coloured object.
Orchids on a Balcony: New Gadget: Light Meter
I collected some common foot candle requirements for orchids on that post.
There are free apps too, but I don't find they're as accurate as cameras.
The formula to work out foot candles from a camera is:
6*F^2/(I*E)
where F = F stop (aperture)
I = ISO setting
E = Shutter Speed (exposure)
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Yeah, i use this method too. Unfortunately, all my orchids are fighting for the brightest spot.
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