Good luck! I am also using 150 watt LED lights 20 hours schedule. Still don't know if it is enough to get a decent harvest with such a setup, or should I get more lamps. Well, let's wait and see the results!
May I ask what is the size of your growbox? And how close do you keep your lights to the tops of the canopy? Thanks!
@John_1984,oh i see, it's not the same as mine then. I'm not gonna lie, i don't know anything about the calculation. The 60cm/24inches is what's recommended for the classic "300w" chinese pannels, and I thought you had the same.
@Yogsothoth, I am using 4x36 watt lamps, I know their ppfd, and adjusted lamp height (about 30-35 cm) and grow schedule (20 hours) to get DLI 22-28, which is recommended for tomatoes and chillies :)
So, as you can see, one may say that I have too little light, but my measurements say the opposite.
And it is interesting to look for journals via similar configurations.