Light intensity

[Jacob Reitsma]

Hello all,

I made myself an orchid growbox with LED lights and I was wondering which amount of light is right.
My box is 80x70 cm and 1 m high and my LEDs are 4x citizen CLU48 1212 4000k driven with ELG-150-C1050B.

With a potmeter I dimmed it back to 85 watt.

In my box there are tree stages were I did some measurements with my phone,
stage 1 ≈ 6000-7500 lux
stage 2 ≈ 15000 lux
stage 3 ≈ 25000 lux.
So let's say its between 6000 and 30000 lux.

Can someone tell me if this is the right amount of should I give more or less light?

Plants I am growing:
bulbophyllum crassipes
dendrobium catenatum
paphiopedilum gratrixianum
pleurothallis solium
brassia nanboh breeze
sedirea japonica (seedling)
cirrhopetalum frostii (seedling)
dendrobium farmeri (seedling)
phalaenopsis hieroglyphica (seedling)
bulbophyllum neilgherrense
dendrobium kingianum
Restrepia mendozae
Pleurothallis hemirhoda