Can you grow in a 60x60x90cm budbox tent 600d myla...

Yeah that would be a bit tight on the height tho..

I’m pretty sure you can make it fit in there. I would recommend a different light tho. That is older technology and the PPFD coverage map looks subpar for flowering. I’d recommend a quantum board style light..

I have a 60x60x120cm tent that I use for drying. My tent would be OK for growing but even 120cm high could limit your grow. I think 90cm tall is too short. When you think about it your pot will be about 30cm tall. Then a light is about 10cm tall and most lights should be about 50cm above the top of your plant. So right from the beginning 90cm is too short for most grows. Are you sure your current light is really 600 watts? Is that their inflated marketing "equivalent" or is that the actual power it consumes? 600 watts is way too much power for a 60 x 60 tent. 120-150 watts is enough LED wattage for a 60x60 tent. The Phlizon 600 you mention is only 100 watts. It does have two switches but I would not call it "dimmable". If shopping for a new light I would get one of the more modern white instead of an older style burple light. Plants look almost black under burple which makes it difficult to keep an eye on their health. A white LED grow light makes it much easier to see the leaf color and spot diseases and nutrition problems.