Thanks for your comment. My blurple actually has some UV LED’s (got lights off now or would send pic). They just look blank like they aren’t lit.
Also, some far red but US company that made my bluple is out of business. They used Cree and Bridgealux (spelling?). It was very expensive and is maybe six years old?
The CFL’s are left over from the days before LED’s and when only an arsonist would put an HPS or metal -halide in a closet.
Twenty years ago had two 200 watt CFL 2700K (needed mogul socket and shaped same as CFL in box in pic above on lower shelf…can still buy last time I looked…6500K one of the few far blue available as cfl…great for veg).
The 6500K burns very hot whereas the 2700K not so much so can drop a 200 watt 2700K (about 9 inches long) right down in the center of your grow about 5 inches from your plants.
The tubes now almost impossible to find around here (unless you want to buy a pallet) especially in the 2700K -3200K. Even though the plants can touch them without burning they make great heaters in the winter.
CFL’s compared to LED’s is no brainer now as LED much more bang for yer buck but still believe UV (2700K especially) aid in crystal production/formation (I of course have nothing to base this conclusion on except stoner observation…lol).
Guess they gonna faze them out for more energy efficient LED’s? Hoard 4 foot tubes now!
Thanks Gpaw