Look up Cob Led grow lights or Quantum boards. And no your light is not full spectrum. Full spectrum led give off white light and look like natural sunlight. Blurple lights like yours are a gimmick and waste of money. Also you are going to be lucky to get a half ounce off that plant at most. 4 months plus for a half ounce is a serious waste of time and money. You need to do a ton more research on growing and not try to go cheap on your equipment. You will be very disappointed in the end.
For starters you need to veg longer. Here is the size you need to veg to get around 3 ounces off a plant.
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These 4 plants were vegged for 5 weeks. I bet you vegged your plant that long and look at the difference. You see how my lighting is white and natural looking? This is a full spectrum led light. Timber 4vs light to be exact. Another problem I see with your grow is you have no vertical space left in your grow area. You need to keep your lights at least 12" from your plant. Your plant is going to double is height when you flip. You don't have the vertical space to accommodate this stretch. Again I am trying to help but you have a long way to go before you get anywhere close to the kind of results you want. Your wasting your time bro. Read read read. Learn. We have all been there. Good luck.