What is this? Saw in video, looks like an upside down metal brush head hanging in tent

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What is this thing? There were two of them in this random BuildASoil video I was watching

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Light and heatsink.

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Looks like a light with a huge heat sink lol. May be some kind of plastic marking cards who knows but sure looks like a light with like an old style heat sink

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Thank you all! I thought it was some kind of radical meter. But it is in fact an LED light, a Timber Grow Lights product

Called the [single daisy]

seems to be an ideal mother plant light

Edit: Unapproved link

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My apologies for the external link, did not know that was frowned upon! Duly noted