Light spectrum during stretch

[pacodelahoya]

This is a question for those that use MH bulbs/4000k led panels for veg and HPS/2700/3000/3500K led panels for flowering. Different light spectrums for different stages of the plants life. When you guys switch to 12/12 until the end of stretch....what light spectrum are you using?

 

[vostok]

I flip off the M/h and flip on the hps 600w kicking out 2700 kelvin (the color of light)
tho 4000k has been very very popular since led/cfl bulbs appered 5 years back?
4000 kelvin = 'phillips' daylight

the same rules with led more so from HLG

good luck

 

[Toker1]

I let the MH (6000K) run for the first few weeks of 12-12. Limits stretching. Then HPS with added UV spectrum until harvest.