flowering marijuana, help

started flowering all 3 plants at the same time and one just doesnt seem to be cutting it, alot of the leaves are covering the pistils and doesnt seem to be getting enough light through the canopy has anyone else encountered this problem? the first picture is the one that doesnt seem to be getting enough light... think itll come around and thicken up? o and the top canopy has about 4 sets of fans leaves like within 4 inches right bunched up togeather thats why im wondering cause its like a big umbrella up there

move or add some lights around

yeah i would have to agree add some light to the sides...

does it seem to thick of a canopy for the light to get thought tho, is it going to affect my yeild cause my other ones that dont have as thick of leaves have twice the pistils