johnsmith_559
- 210
- 28
hello
so I am trying to get some light meter reading in footcandles on a led .
I would like them done at 1 ' intervals up to 4' .
There is a lot made of PAR spectrum but this goes hand in hand with footcandles.
Par is the color or spectrum of the light not the intensity.
PAR would be the ec and ph of the water and FOOTCANDLES is the volume of flow.
Fill a swimming pool with water and focus just on the PAR and you got a wee puddle with excellent water.
Add footcandles and your pool fills up with excellent water and volume .
All lights have a PAR ratio. It is not like s light puts out light with no par .
Once minimum PAR is met it's all about the footcandles.
In the early 90's LOW PRESSURE SODIUM was used in conjunction with Mh with VERY good success .LPS had the most efficient light source .
HPS were about 150/160 lumens per watt .
LPS were closer to 180/200 .
the MH light was able provide par and the LPS provided intensity .
The issue was they were awkward and expensive. HPS were less efficient but also stand alone.
In 1994 there was another NEW source . It was called something similar but I can not remember. something sodium. If you were around then they were in ALL the magazines about how they were revolutionizing the industry. These has a little bulb like an incandescent and they were connected together with a long tube like a fluorescent. They were supposed to put out double the light or more .....never saw one ...they came and went.....
Now LED are the new thing. They definitely have advantages. but I have yet to get a reading on them that I liked. I have read a few small wattage lights and got 3000 fc but only 1' from the bulb. it ran out very fast and was less than 1000 fc at 2' .
Now I have had numerous discussions with people who said PAR would not read in footcandles but that is not true .Any light expert can tell you this .It is not how photon sensors work in light meters .differnt light has different color but they still travel in photons. .
So anyway , long story...I would like a test .
1 foot , 2 foot , 3 foot, arms 4 foot.
a footcandle meter is available free at app store
If you can do this I wound appreciate it .
I am well aware of all aspect and do NOT wish to debate before test is done .
Would like the test and wattage light please.
thank you very much !
so I am trying to get some light meter reading in footcandles on a led .
I would like them done at 1 ' intervals up to 4' .
There is a lot made of PAR spectrum but this goes hand in hand with footcandles.
Par is the color or spectrum of the light not the intensity.
PAR would be the ec and ph of the water and FOOTCANDLES is the volume of flow.
Fill a swimming pool with water and focus just on the PAR and you got a wee puddle with excellent water.
Add footcandles and your pool fills up with excellent water and volume .
All lights have a PAR ratio. It is not like s light puts out light with no par .
Once minimum PAR is met it's all about the footcandles.
In the early 90's LOW PRESSURE SODIUM was used in conjunction with Mh with VERY good success .LPS had the most efficient light source .
HPS were about 150/160 lumens per watt .
LPS were closer to 180/200 .
the MH light was able provide par and the LPS provided intensity .
The issue was they were awkward and expensive. HPS were less efficient but also stand alone.
In 1994 there was another NEW source . It was called something similar but I can not remember. something sodium. If you were around then they were in ALL the magazines about how they were revolutionizing the industry. These has a little bulb like an incandescent and they were connected together with a long tube like a fluorescent. They were supposed to put out double the light or more .....never saw one ...they came and went.....
Now LED are the new thing. They definitely have advantages. but I have yet to get a reading on them that I liked. I have read a few small wattage lights and got 3000 fc but only 1' from the bulb. it ran out very fast and was less than 1000 fc at 2' .
Now I have had numerous discussions with people who said PAR would not read in footcandles but that is not true .Any light expert can tell you this .It is not how photon sensors work in light meters .differnt light has different color but they still travel in photons. .
So anyway , long story...I would like a test .
1 foot , 2 foot , 3 foot, arms 4 foot.
a footcandle meter is available free at app store
If you can do this I wound appreciate it .
I am well aware of all aspect and do NOT wish to debate before test is done .
Would like the test and wattage light please.
thank you very much !