The Tesla has 2250 lumens available to the plant, at which distance they're not saying. Cannabis needs roughly 3000 lumens per sq ft to flower. The measure of light is usually taken at 1 ft away from the light so thats telling me that you would need 4 of those at 1 ft away to produce a sad 9000 lumens and that's if they were close together, spaced apart it takes away light. That's not even taking away for penetration and shading. My 400w puts out 45,000+ lumens at 1 ft, see the difference.
What you are saying is true, having experimented with massive amounts of CFL and in fact LED I can now say that I have gone back to 2x 600W dutch poots, why? because the HID still has the penetration factor that LED can't deliver right now or CFL never going to deliver.
You are right about LED or Induction not quite being there yet but before we know it they will, so it is prudent to stay in the shadows till it is truly on par but then leave the brave and courageous experimenters to do exactly that, some lead others follow.
And with the advent of induction and LED more and more people/growers are realising that there is more to a plants needs than just lumens or the right colour spectrums, plant lighting is a combination of requirements that current design and technology still has not covered effectively. HID may be the industry standard but it ain't perfect.
