Switching to bloom lights

hi guys, when do I switch from mh to hps bloom lights?
Before or after stretch?
There seems to be different opinions.

What is best?

Any advice appreciated

Rainbow Warrior said:

hi guys, when do I switch from mh to hps bloom lights?
Before or after stretch?
There seems to be different opinions.

What is best?

Any advice appreciated

Click to expand...

When you start 12/12. Unless some how your hearing otherwise.

unless you are growing autoflowers (which I know very little about), the "stretch" is another term for the preflower stage which happens after you switch the lights to 12/12 and when you switch to 12/12, you should have your hps light in. so,....basically what mongo frog said ha

If you want more stretch switch to HPS when you flip. If you want a little less stretch stick with the MH for the stretch.

Cheers guys!

Renfro is on the money. I also do mh "at least 1st week of flower" some times 2 depending on strain. Then I run super HPS dual spectrum, my girls seem to love wider spectrum.

Renfro said:

If you want more stretch switch to HPS when you flip. If you want a little less stretch stick with the MH for the stretch.

Click to expand...

ive never heard this before, but im not doubting it. damn, that knowledge would have came in handy as i would have liked to prevent some stretching this grow. will have to try next time? doesnt have any adverse effects,...everything still stays right on schedule, just less stretch with mh for the first week? thats a cool tip

The HPS increases stretch due to the far red causing the plants shade avoidance mode to kick in.