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solarmeter® · 1st May 2008, 06:45 PM

It would be twice the 119.9 = 239.8 J/cm² for 20 minutes.... IF it read 199.9 mW/cm² at "face position"... distance from LED cluster surface to face surface (cheeks not nose). We don't know what it reads at that distance because he stuck the meter right up against LEDs it looks like in picture.

Don't confuse meter readings with dose. Dose is intensity x time.

1st May 2008, 06:45 PM	#69 (permalink)
solarmeter® UV Geek Squad Join Date: Nov 2004 Location: Lake St Clair Posts: 3,327	Re: Tan America LED Light Therapy It would be twice the 119.9 = 239.8 J/cm² for 20 minutes.... IF it read 199.9 mW/cm² at "face position"... distance from LED cluster surface to face surface (cheeks not nose). We don't know what it reads at that distance because he stuck the meter right up against LEDs it looks like in picture. Don't confuse meter readings with dose. Dose is intensity x time. __________________ ......................Flashback 2001........................ "One of the 'ORIGINAL' TanToday Gang"