[Pavel Chaloupka]

Well all the the exact data I have ever seen on lighting for algae cultures were simply number of photons/second/ and some square unit, as I based all my cultivation methods on scientific papers, but I would assume that is not very helpful for you 🙂 But intensive outdoor cultivation runs well with daylight, use any daylight type if you want to have lighting. Do not use to strong, very strong lighting may lead to the colapse of the culture. South directed windows are not optimal during summer. I use small aquariums for cultivation that are built to be like 30x30x10 cm and place them on the window or give a 18w tube in front of two of them. With the earation stearing, all cells should get enough light. What seems to be more important for intensive cultivation is for how long per day the light is available. 12-16 hours is ok. Of course longer is better but again, 12 hours is just ok. If you intend to do it start slow, with new cultures, if you have windows in the room you do not need any aditional lighting for starting the culture. After when you have bigger tanks and high density of algae, than lighting helps.