as i said before im a total beginner . in the start i was using cfl and i had no problems finding the right distance but since a while ago i switched to led and im having difficulty setting the height from the canopy. are there any rules or tips or eye signs that can help me define if i am too close or too high? are there any first signs on the leaves i mean so that they can make me to adjust further? hope i explained it the way im thinking of it english is not my native
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i have ordered the tsw2000 from mars hydro but for now i decided to try one grow on the vipar 450 reflector. but on the manuals distances i was seeing problems so i wasted 10 days to find the right height and still not sure. the problem is that they test them on 4x4 tents so when you install it on a 2x2 all the numbers are different i guess .
at the end i decided to get the lumens with the sensor of my phone and convert it to par .
i found this site where i can select the type of light .
https://www.waveformlighting.com/horticulture/convert-lux-to-ppfd-online-calculator
The rule is to always follow the manufacturer's recommended light distances. Well, general rule lol. What grow light are you using? The listing should have recommended distances and/or a PAR chart for guidance. Pics of heat stress and light burn: https://www.growweedeasy.com/cannabis-plant-problems/heat-light-stress