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Using a Double Ending Hp S Light for Vege and Flowering
In the old days, everyone always used metal halid lights for vedge and high pressure sodium for flowering. Now eli ds has passed up hih pressure sodium by quite a bit an efficiency. But it really isn't because the spectra is better. A lot o lights have 15, 20, even 25 % blue. And that's not an optimal spectrum through poto synthesisandn may keep the plants too short.