Your math doesn't matter, you're comparing HID wattage to LED and talking about 60% less power. Who tf does that?
The lights he's looking at will be fine. Which is what was asked.
Why are you comparing LED wattage to HID? Of course there's gonna be a huge discrepancy there, but it's meaningless.
Still, between the lights he listed and a 600w LED it's 7-8w difference.
I stand by first answer.