Leaves are turning lighter green

My weed are in week 3, may I ask what does the problem it have?
Thank you so much

Are you foliar spraying when lights on? Just asking and Could be another problem.

Yes. I frequently foliar spraying during light on due to the humidity are lower than 40%.

If spraying with lights on, you will need a wetting agent like Optic Foliar’s Transport.

That is mainly a problem, spraying with lights on burns the leaves since water drops act like a magnifier. A humidifier will do the job to raise humidity in the room or wet towels.

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Thank you

Thank you so much

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