I tell people this until I am blue in the face! LEDs do not burn cannabis plants - PERIOD. unless they physically touch the diodes and then it is heat and not light that burns them.
The sun provides up to 2000 PPFD at noon and cannabis plants don't burn unless the air temperature is above ~95°F then maybe some strains could have trouble.
What people attribute to light burn is really a nutrient problem. LEDs are very efficient at converting power into light energy. With increased light energy the plant will uptake water and nutrients at a faster rate when the lights are turned up. It is the increased nutrient uptake that burns the plants. Many growers have too much fertilizer in the pot to start with and this just pumps it up into the plant.
I do not recomend and the science backs me up on this Do not run 24/0 at minimum give your plants 4 hours of dark per day.