UV LED Strip for Cure Booth Build

I would like to build a UV cure booth. I'd like to hit 575 mw/cm2 from 1 foot from lights. Your LED strip lights say the irradiance values increase linearly (theoretically). Does that mean that two strips would double the listed output of one? Also, how much heat do these lights produce? 

We can confirm that when two realUV LED Strip Lights are installed, the μW/cm2 falling upon the target will theoretically be doubled, though there will be some small differences depending on the spacing of the LED Strip Lights. 

We have attached a link to an article from our website regarding the heat that can be expected from the LED Strip Lights. In short, we have measured a typical temperature rise of 54°F (30°C) over ambient temperatures during operation. 

How Hot Do LED Strips Get? Is It Normal?