TanToday - Helping Salon Owners, One At A Time, Since 2000! - View Single Post - Just metered my beds for the first time. Got some questions.

solarmeter® · 22nd January 2008, 07:45 PM

The 33.5 is quite OK for 100W. Are they new era or old era?

The 0.96 / 33.5 = 2.87% UVB... so probably new era.

They might go up a bit as they break in (10-20hrs) - and swirling stops. Then, of course, they will head down maybe 15% in 100 hours and slowly fall 30% in about 500 hours+.

PS: Old era peaks at 350nm and usually has higher percent B and lower amount of A.
PS: New era peaks at 365nm and usually has higher amount of A and lower percent B.

If you don't know which kind you have, ask your sales person... or if he/she says "huh?" then ask John at URI.

22nd January 2008, 07:45 PM	#2 (permalink)
solarmeter® UV Geek Squad Join Date: Nov 2004 Location: Lake St Clair Posts: 3,325	Re: Just metered my beds for the first time. Got some questions. The 33.5 is quite OK for 100W. Are they new era or old era? The 0.96 / 33.5 = 2.87% UVB... so probably new era. They might go up a bit as they break in (10-20hrs) - and swirling stops. Then, of course, they will head down maybe 15% in 100 hours and slowly fall 30% in about 500 hours+. PS: Old era peaks at 350nm and usually has higher percent B and lower amount of A. PS: New era peaks at 365nm and usually has higher amount of A and lower percent B. If you don't know which kind you have, ask your sales person... or if he/she says "huh?" then ask John at URI. __________________ ......................Flashback 2001........................ "One of the 'ORIGINAL' TanToday Gang"