Confused with light schedules for outdoor growing

Ok so it seems you are close to the equator since I am in the middle east we also have less than 16hours of daylight per day at the longest day of summer and I was doing a few things to prevent early flowering when daylight hours were below 14hours per day. However cannabis does not follow the 12-12 system it actually follows the 14-10 system 12-12 is a standard used just to make sure that the plants are responding well to the photoperiod. In other words cannabis has critical day length of 14 hours and going anywhere above or below that will either make the plant more prone to flowering or more prone to vegetation also the transition isn't as black and white. at 13 hrs of daylight per day your plant will flower but it will also vegetate, however it will take much more time to finish (about 100days instead of the standard 50-60 days for indica). Sativas are more sensitive to light and will vegetate with less light per day which will save you ALOTTTT of effort on your part to maintain your growth. Lastly you could install a very small light close to ur plant, any light source above 20 Lumens will interrupt the photoperiod, and turn it on 30 mins in the middle of the night when the plants are most sensitive to light or before you go to sleep this way you split the dark period into 2 and essentially signaling your plant to vegetate. Happy growing!