CDM Lights 630w??

[Gjohnstone]

I am looking at a CDM double ended light, it is actually two bulbs that are 315 watt. It has a digital ballast. I cannot find them with a cooling hood. I grow in a 4x4 tent and am worried about running this without a cooling hood. Does these run cooler??

[Toker1]

Do you possibly mean CMH?
630w is 630w. Doesn’t run cooler. Watt is a measurement of energy and time. It converts directly into BTU. So yes, it’s hot.
Here is an air cooled version.

https://www.ebay.com/itm/Sun-System-120V-LEC-Grow-Lights-630w-4200k-Grow-Light-Bulbs-Brand-New-in-Box/292663438248?hash=item442419aba8:g:o4IAAOSwHqxbYOh9