Math behind LEDs

I have grown under 400w (price cca 250USD+ with quality reflector)

Soon I will try LED - 4x 3500k, 200w - homemade by one of local grower, looks really proffesional, upgradable - (price cca 670 USD) - something like this https://overgrow.com/t/led-300w-4x-cree-3590-3500k-max-75w-wilma-8xl-6-5l-air-pots-sour-diesel-riri-cut-homebox-100x100x200-par/819

I’m curious about the differences between 200wLED & 400wHPS. I mean, it makes sense… due to electricity prices in Europe. In our small country LEDs are experiencing boom.

96x 5,4w leds does not inspire much trust in me… I doubt it will fully replace 1000wHPS, but maybe I’m wrong.

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