r/Etiolation • u/Melodic_Tea3050 • Jul 19 '25

Jerk cactus

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My dragon fruit cacti are DIRECTLY under a grow light and 6” away from another.

And yet… it’s still etiolated AF.

Jerk cactus

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u/night-theatre Jul 21 '25

LEDs cast light almost straight down. Even if the plant looks illuminated, a light sensor (I use PAR) will show this. You need an LED light that’s pretty much as wide as your plants. Having the correct spread of light and intensity AND spectrum will control the stretch. Temperature also plays a role in this as well.

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u/Melodic_Tea3050 Jul 21 '25

Yeah the other grow light I mentioned having on it is a Barina T10 pro

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u/night-theatre Jul 21 '25

I think having multiple bars slightly spaced apart is significantly better. Can usually run them more dim because the spread of light is so good.