Originally Posted by MerryPrankstr
Thanks for the compliment.
I don't know anything about that source of lamps, but their claim seems a bit optimistic, IMHO. Maybe 2:1 efficiency but 4:1 would be stretching it.
"They do seem to be "stretching it":D
After following Weezards posts on LEDs elsewhere I'm wondering if I have a bit too much light in my tent so I've ordered a lux meter and will take some measurements when it arrives.
Worth doing, I learned a lot with the lux meter.
'til it comes though, a practical indicator of too much light ,( over 91k lux), is a drastic slowing of photosynthesis.
Good indicator of that, is transpiration.
If you have a spare scale, set the plant on it and leave it there.
If the weight stays constant for more than a day, she's not moving water, growth has stopped, raise the light an inch or so and see if it resumes.
Watered the front plant with 1/2 ususal amount at 1/4 nute strength this morning. rear plant has about 1 more day until it needs water/nutes.
MP