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home blue LED devices

 
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NickJeter



Joined: 22 Dec 2007
Posts: 28

PostPosted: Thu Jan 24, 2008 3:24 pm    Post subject: home blue LED devices Reply with quote

is there any effective home blue LED devices out there,that have the effective
w/cm2, , joules? what range do those have to be into be effective?

the only one i found is
id fr m evisbeauty.com called mini-marvel

it is 405-425 nm
143.5 w/cm2
24 minutes twice a week
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orangehrzn



Joined: 23 Feb 2005
Posts: 1005

PostPosted: Thu Jan 24, 2008 9:19 pm    Post subject: Reply with quote

"Phototherapy with blue (415 nm) and red (660 nm) light in the
treatment of acne vulgaris", British Journal of Dermatology 2000; 142: 973-978, P.PAPAGEORGIOU, A.KATSAMBAS AND A.CHU

The parameters in the above effective study were

415nm
4.23 mW/cm^2
15mins / day

I'm pretty sure deep blue light diode bulb can achieve such parameters.
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davpet



Joined: 28 May 2006
Posts: 83

PostPosted: Sat Jan 26, 2008 3:04 pm    Post subject: Reply with quote

Omnilux is apparently going to release this product soon :

miinews.com/pdf/fa_ptl_nov07.pdf
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NickJeter



Joined: 22 Dec 2007
Posts: 28

PostPosted: Sun Jan 27, 2008 3:11 pm    Post subject: Reply with quote

the omnilux will be around 400-500 dollars and the minimarvel is
225.


i dont why the big difference in price is if the blue
omnluix
415nm
40 mW/cm2


mini-marvel
415nm
143.5 w/cm2


is mW/cm2 differnent than w/cm2?
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orangehrzn



Joined: 23 Feb 2005
Posts: 1005

PostPosted: Sun Jan 27, 2008 7:29 pm    Post subject: Reply with quote

143.5 W/cm^2 doesn't make any sense, it's HUGE power density that's going to burn your skin if correct

probably it's 143.5 mW/cm^2

The prices of LED devices for skin therapy are overblown out of proportions and are based on marketing strategies not on how effective the device is or how much it costs to build it. Simply buy a deep blue LED light bulb and you will have the same device for 10 times lower cost.
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mills



Joined: 09 Nov 2007
Posts: 16

PostPosted: Mon Jan 28, 2008 4:01 pm    Post subject: Reply with quote

hi orange thank

do you know what the conversion is mW/cm2 to W/cm2

like the one that is 143.5 w/cm2 is that really 14.35 mW/cm2?

thansk
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orangehrzn



Joined: 23 Feb 2005
Posts: 1005

PostPosted: Mon Jan 28, 2008 8:43 pm    Post subject: Reply with quote

The prefix 'milli' means 'one thousandth' so the conversions are

mW = 0.001 W and W = 1000 mW

143.5 W/cm^2 = 143 500 mW/cm^2 (it can't be that high, it's a typo)
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