Too much lighting?

No such thing as too much light! Well almost. Your problem is the blurple lights, which really are not good for much - wrong spectrums, not enough lumens etc. Your other problem is that you defoliated your plants right before flowering. Defoliation just reduces your plants' capacity to produce energy, meaning smaller growth and slower growth too. When you are at the very bottom with light strength, then remove all those healthy, energy producing leaves, the results are going to be severely limited. Just remember - Maximum amount of healthy green leaves = maximum amount of energy produced = maximum growth. It really is that simple and basic plant biology. Not much you can do with this grow, but getting a better light/lights and not defoliating will get you better results in future. The more lights you have, the better the coverage. Look at eBay, most sellers of LED lights will show in their specs what sort of "core coverage" their lights produce for when the plants are in flower. It is this figure that will guide you as to how many/much lights you will want/need. Obviously, the bigger the light the bigger the flowering coverage area, however having 4 slightly lower powered lights will usually give you a better spread of light and a bigger flowering "core coverage". By this, I mean, 4 x 500 watt lights (for example) will give you more versatility and better "core coverage" than a single 2000 watt light. Determine the size of your grow area that you want to use, then look at the recommended "core coverage" figures for flowering and this will guide you as to which lights will suit you. For example, if you have 8 square feet to use, find the figure that tells you how much that one light will have for "core coverage" during flowering. If the light only has one square foot of "core coverage" during flowering, then you will need 8 of those particular lights. If the light has 4 square feet of "core coverage" during flowering, then you will only need 2 of that particular light. Unfortunately, to grow the best plants you need to buy the best lights you can afford. Saving money by buying cheap lights will just not give you the returns you seek. As an aside, photoperiod plants will always out yield any auto flowering plant, as you can control when to initiate the flowering cycle and not be dictated to by the auto flowering genes of auto flowering plants, so please don't think of giving up on photoperiod plants just yet. Upgrade your lights, resist temptation to remove any healthy, green, energy producing leaves and in no time you should be harvesting choice flowers. Hope this helps, ............ Organoman.