Banana Purple Punch - first grow

This myth comes from trichomes being produced as a defence against UVB radiation, and getting more UVB light penetration onto the buds will absolutely make the plant produce more trichomes and therefore a higher THC potency in the final product. However, where this comes unstuck is the fact that indoor grow lights do not produce any light in the 200-300nm wavelength range, unless it's a specific UV light. If you want to get more light to lower buds by cutting the leaves above off, don't. Cut off the stem below which is not getting enough light, because it's already further away from the grow light than the leaves above, and anything that is above will give its energy to the buds that it is connected to. The growth phase is not stopped, the growth is concentrated into flower growth, and the leaves are needed for this. Moral of the story is, biological science tells you the opposite of weed growers old wives tales more than most weed growers can tell you about biological science