Light snobs among us, don't knock the "blurple" lights. They are effective and cost less to purchase and run than HID or similar lighting. When I decided to grow cannabis, I researched for months and months. I knew I wanted to grow as fast as possible, so I chose hydroponics. I went with ebb and flow because it was something I knew I could understand and oversee. The lights were another matter. I bought a Viparspectra full spectrum 300 watt equivalent for my first grows. The grows were nice, but I wasn't getting much out of the harvest, just four ounces or so. So I added a light, the same light. 600 watts equivalent was doing the job better, and I was getting an extra ounce or two. When I decided to add the second tent for cloning, I bought a dimmable light, also Viparspectra, 300 watt equiv. I liked it so much I bought another one for the big tent, and now I have 900 watts equivalent over my canopy in the grow tent.
The last yield with four plants in the tent was a bit over 9 ounces of bud. I also had about a pound of trim. Sugar trim.
Now I'm growing three Mazari Grape plants in the flowering tent, and they were just flipped to 12/12. Three because four was too many. I had one plant that was sickly because of crowding. Now all three are doing well.
I don't do everything right. I have made a lot of mistakes, but because I'm willing to take chances and experiment, I have learned a great deal about growing cannabis using hydro (ebb and flow) and DWC (for cloning.)
And I feel I have enough light in my flowering tent to grow as much as possible in the small 2X2.5 feet X 57inches tall tent.
Why is blurple or LED given such a bad rap? I really want to know.