Orchid light requirements in lumens?

[Roey.P.]

For a 29on 75cm shelf 88cm high
Can someone elaborate to me what low, medium and high light are in lumens. Got;

1. T5 bulb 22.5w 4000k cri 80 1600 lumens white 55cm.—can fit
2. T5 bulb 27.9w 4000k cri 80 2600 lumens white 115cm.-to big
3. T5 bulb 54.1w 6500k cri 80 4100 lumens white 115cm.-to big
4. T5 bulb 22.5w 6500k cri 80 1600 lumens white 55cm. - can fit got 2.
Can you suggest me which is better how far to put it from the plants. Should I get 2700k too for bloom? Is there anoyher cheap and useful bulb too try? T8 is reducing fast and too big anyway gor me. Thank you all!

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