4x2 wattage needed

I have a small 4 by 2 grow tent. How much actual wattage do I need for three plants…?
Right now I have a" 600" w light…only drawing 100w of power. I was going to purchase a second light…

400 watts of blurple or around 250 to 300 watts of higher end LEDs.

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Most shoot for 30-50 true watts per sq ft so anywhere from 240-300 true watt draw should work well but it goes much deeper when you look at ppfd in regards to how much light within an acceptable spectrum the plants will receive

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Info above is accurate. Ideally you would target light density levels for your space. Some lights are better at producing light than others, so trying to judge by power consumed is difficult.

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