ICMag with help from Landrace Warden and The Vault is running a NEW contest in November! You can check it here.
Prizes are seeds & forum premium access. Come join in!
If the plants are able to handle sunlight(hardened off, or started under natural light), supplemental light wont hurt them. Are you in the Southern Hemisphere?
You can use lights to extend the day or supplement on low light days. A lot of commercial greenhouses do this, usually with HPS and not MH. Normally you would not run the lights on a sunny day as it is a waste of money.
Εμπορική θερμοκήπια χρησιμοποιούν HPS να συμπληρώσουν φως σε χαμηλά ημέρας το φως, αλλά και να επεκτείνει το μήκος ημέρας, όταν χρειάζεται. Μην χρησιμοποιείτε τα φώτα σε μια ηλιόλουστη ημέρα ή θα σπαταλήσετε μόνο ηλεκτρική ενέργεια.
i have a greenhouse as well as an HPS in there. its fine......
i have the timers set to kick on an hour or 2 before sunrise and an hour or 2 after sunset......just until they are vegged as big as i want em then im going to kill the lights and just let them proceed naturally into flower.....