Unless your plants show a deficiency, giving them more of any nutrient will not make them bigger. You can't force feed a plant to fatten it up. And many nutrient companies still sell you the myth that plants need a lot of phosphorus in flower.
More light might make for bigger buds if your current one is under powered for the space, but over a certain amount of light there is no added benefit without major tweaks like added CO2 and heat.
More light might make for bigger buds if your current one is under powered for the space, but over a certain amount of light there is no added benefit without major tweaks like added CO2 and heat.