indeed the wild card is does putting the light through the acrylic decrees the micro moles (measure of photons per second) some crops have a DLI (daily light integral) of say 15 and others say 20 moles so to figure out if your crop is getting enough light you look up the DLI for the given crop and say lettuce is 17 and your photo period is going to be 16 hours so you want to be able to deliver 17 moles in 16 hours go over and you have problems like tip burn plant gets to much energy but not enough nutrient absorption during the day so when it grows at dark period it doesn’t have enough say calcium to support cell growth so you get sludgy tips on new leafs or not enough DLI and your wasting crop space because the plant is not growing as well as it could be due to energy shortage. so you take the moles / photo period / 60/ 60* 1,000,000 (because whole numbers are easier to read then decimal 17/16/60/60*1000000 = 295 micro moles so to hit 17 moles a day you need a light that will put out 295 minimum and if its more then you just adjust the photo period. so that was the long way to explain the concern (figured teach when I can) so if your light system is only doing 300 micro moles then you don’t have much tolerance for say a 15% performance loses due to setting up a light pipe hence me being curious if anyone has tried. larger crops like say a cucumber or pepper may be like 22 DLI.
I am a dork and made a par map for my garden when I rented a li-cor quantum sensor last year so I could understand my settings eg as plants grow more they get close to the light and absorb more photons then they should when they are 13 inch away so I needed to know how to calibrate the lights for ech growth zone so they don’t get over juiced on DLI
I wouldn’t call this a full high jack but ya a derail with a common interest of how to leverage acrylic with LEDs and in this case would it make a good focusing medium with out attenuation photon output to greatly to cause poor growing conditions