I came to the conclusion from my plants, that until there are actual flowers/buds developing, the plants are still utilising and need Blue light the same as they would in the Vegetative period.
The sudden shock of a drop to 12/12 means that the plants are going to stretch a little regardless but it is Blue light that provides what they need during this period of time for this process of growth and they will not stretch much.
The only reason a plant stretches is due to lack of light, if you remove the light a plant needs or is using, it stretches to look for it.
This is why I feel that using blue light or keeping it until the plants adjust to the 12/12 schedule stops or at least dramatically slows down ''stretch'' and will keep internodes very tight during this 1-2 weeks. Red light would not need to be used at this point because the plants will not yet be in the process of building flowers therefore it would not be utilised the same as Blue.
I think the plants only stretch because they are not getting the light or spectrum they need, when I watched my girls stretching for that HPS like crazy ( it was only kept 2 inches from the tops ) it looked like a classic sign of light deprivation.
Once the 1-2 weeks of ''Stretch'' is over and flowers are beginning to form seems to me to be the perfect time to introduce the Red spectrum because that is the only time the plants are actually going to need it.
That seems to me to make sense
ha ha
The sudden shock of a drop to 12/12 means that the plants are going to stretch a little regardless but it is Blue light that provides what they need during this period of time for this process of growth and they will not stretch much.
The only reason a plant stretches is due to lack of light, if you remove the light a plant needs or is using, it stretches to look for it.
This is why I feel that using blue light or keeping it until the plants adjust to the 12/12 schedule stops or at least dramatically slows down ''stretch'' and will keep internodes very tight during this 1-2 weeks. Red light would not need to be used at this point because the plants will not yet be in the process of building flowers therefore it would not be utilised the same as Blue.
I think the plants only stretch because they are not getting the light or spectrum they need, when I watched my girls stretching for that HPS like crazy ( it was only kept 2 inches from the tops ) it looked like a classic sign of light deprivation.
Once the 1-2 weeks of ''Stretch'' is over and flowers are beginning to form seems to me to be the perfect time to introduce the Red spectrum because that is the only time the plants are actually going to need it.
That seems to me to make sense
ha ha 
