Spider Farmer 4000W LED Grow Light Samsungled LM301B Indoor All Stage Veg Flower

Description

Spider Farmer 4000W LED Grow Light Samsungled LM301B Indoor All Stage Veg Flower. Condition is "Used". Shipped with UPS Ground.
I'm not sure what the yellow stains are, the light works fine.
This unit does have anoisy driver when dimmed very low.
I exchanged 3, they all did this, so it must be an inherent flaw with the driver they're usng, but it did not have any negative effects other than being annoying.400
Light has about 6 months of use.