Hello RegularGuy.
I completely understand that concept that you mention, These bulbs are putting out about 4000 lumens each ( 16,000 total )
But the difference in there bulbs and normal fluos, is that these have been designed for plant growth. ( I am actually working with and testing them for the manufacturer , if they only knew I what I was growing :-) . They are full spectrum lights. So also to make up for the tons of Green, we added 2 - 3000k bulbs as well ( they are full spectrum as well, but with a lot more red then any other color. )
We are also working on a more HPS type bulb now. Most HPS bulbs I looked at are 2100k - 2200k and CRI of 21 - 25. the new bulb will be 2100k at 4000 lumens, with a CRI of 96! The high CRI rating should ( in theory so far ( CRI makes it brighter, the closer to 100, the closer to natural sunlight it is ) ) make up for low amount of lumens ..
We will see :-) Will let every one know the results..
Regards.
Morphious |