And don't believe what people say about misting with the lights on, cause I foliar feed all the time with the lights on and have NEVER seen that happen in 10 years of growing. If its something like neem oil then I wouldn't recommend spraying in direct sunlight but just water you will be fine
In regards to the number of factors which can be at play on foliar spray burns, I cannot say that you are correct or incorrect in your statement "not to believe what people say about misting with the lights on", just as I also cannot say that you MUST NOT water them during the day, because perhaps you may...
So many factors are at play here: Temperature, the hours of light exposure every day, time of day(IF outdoors), humidity, the age of the plant, if it has been recently brought outdoors from indoors, the genetics of the plants play a massive role as some plants can survive lower or hotter temperatures than others, and the same goes with altitude.
There are just far too many factors for me to say not to worry about it, I simply wouldn't recommend it, although depending on your plants, you can always be willing to give it a shot to see if your plants can handle it, and if so, then you're in luck and this is a very nice feature for your plants to have - after all, it is a admirable feature, just as how some plants are less susceptible to mold. . .
