I know from literature that the range is very big like between 80 - 1000 µmol/(m²*s). My aim is to find a LED light source between the range of 150 - 300 µmol/(m²*s). When I look on market ther irradiance is often given in LUX and lumen. So how can I convert his value in µmol/(m²*s). Is there an "easy" equation for it, which I can solve in Excel ?
Dear Halil,
I can figure out two different issues in your question. First is the light source which can provide you the required range of PFD for your experimental work - i.e. 80 - 1000 µmol/(m²*s), and the second is how one can measure/convert the common intensity units. Here is my answer to your queries -
Commercially available LED sources generally don't provide the required PFD range (80-1000). I would suggest you to look for very high wattage LED sources or customize your own light system, as I did in my studies (link appended) to get the desired intensity. Developing a high wattage LED has its own set of challenges and you need support of people working in power electronics to get it fabricated.
Second, the correct method of measuring PFD of any light source is by using Quantum Light Sensor, and not the Lux meter. Converting Lux to PFD using the conversion chart has many shortcomings and is therefore not precise.
Hope I have answered your questions. If you have any further queries, please feel free to write to me at [email protected].
Good Luck!
Yuvraj
Enhancement of Chlorella vulgaris cell density: Shake flask and bench-top photobioreactor studies to identify and control limiting factors
https://link.springer.com/article/10.1007%2Fs11814-016-0087-5
Hello Yuvraj Saxena
First of all, thank you very much for your detailed answer and your willingness to help. I read your article, saved it, and was able to make some notes that will surely help me with my research in the future. I will certainly contact you if I have any question. It is very valuable to seek advice from a professional. Regards Halil
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