Keep in mind that those 2200 lumen shine 360 degrees but only those lumen in the lower 30 degrees hit your trees. To get all the light from your bulb you need to paint all other surfaces bright high gloss white so the tree gets a bright sky effect. from the other 270 degrees of light that would otherwise miss your trees.

It is the bright white surface of the buckets that make the plant to grow so fast. Your closet needs to do the same.

This grafting has put on 62 inches of linear total growth since8-28-2020 when the grafted bud just started expanding. 3 months 2 weeks.

Steve

alright, its all painted bright white, i can most likely direct all the light downward with molded alluminum paper. i'll try that out

Any idea how many lux I need? my lights give me 4000-13000 lux depending on what part if the folliage i look at (500-1300 foot candles)

Update after 3 weeks:

lights came early, the plants have been receiving around 12-14hours a day. The plants have not lost a single leaf ever since I added the lights.

My valencia is showing sings of wanting to grow actually. This is exciting.

Light is one of the most important things for our plants Kevin. Glad you figured it out. I use some of the best inexpensive lights that grow my plants wild.

re update, I thought my valencia was missing some nutrients because some newer leaves where geting blotchy yellowing. It happened last spring when it was about to grow. I looked a bit closer and turns out its just taking nutrients from older leaves to make new growth! Awesome, these lights must be working good, the tree thinks its spring.

I've done plenty of research, and the type of light (fluorescent, LED, special grow lights, etc) doesn't really make much difference at all.

I personally use regular 5000K LED bulbs. I use a "100 W equivalent" (actual 13 W in this case) per every approximately 2 x 2 foot area. However, a "75 W equivalent" will work fine too. You could use "60 W" and they will still grow, but will grow a little slower.

Keep a good distance between light and plant, maybe between 1 and 2 feet (not talking about plants more than 3 feet tall).

The special lights they use in commercial operations are just to achieve maximum electrical efficiency. However, for small scale hobby use, it really doesn't matter. And any "wasted" electric power will just add some beneficial heat to the plants, which is still a pretty trivial amount of power compared to an electric heater.

You can buy cheap special spectrum grow lights, but the thing is, the efficiency of conversion of electric power to usable light in these special lights will be lower than average LED bulbs for home lighting, which completely negates any benefit to the plant being able to more efficiently utilize light from a special spectrum. That's because with mass production of LED bulbs, they've put a lot of effort into trying to create maximum efficiency, so you end up getting a much better value for the cost.