Cheap Grow Lights

Do you need cheap grow lights for your hydroponics, aquaponics, or other stuff?
I have 6 400 watt Metal halide lights I converted to plug-ins.
Similar to bay lights but do not have to be hard wired.
You could also use CFL bulbs if you chose.
Cost over $400 each new.
$100 each or all 6 for $500.
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