Findings:
Power
12W power = 3*3W LEDs required after efficiency (Power LEDs spread the light evenly)
Array
10*6=60 LEDs, assume 5mm
That's 3.92W assuming 20mA at 3.3V. (Then we'll need to spread the light)
Other:
Lithium Ion cells....
Case.
So we'll have to spread the light out.
The goLITE BLU also features a wider field of light than other light boxes, which means that you can work, watch TV, read, or eat meals while using the light box, rather than having to sit close and directly in front of it.
Power LEDs do seem more cost effective and simpler to deal with.
Power LEDs
http://cutter.com.au/products.php?cat=Cree+XPE
http://cutter.com.au/products.php?cat=Cree+XRE
http://www.dealextreme.com/details.dx/sku.11015
http://www.dealextreme.com/details.dx/sku.13289
5mm LEDs
http://www.dealextreme.com/details.dx/sku.9077
http://www.ledsales.com.au/cart.php?target=category&category_id=43
Maybe someone can do up an analysis on cost/power/performance etc
How about these?
ReplyDeletehttp://cgi.ebay.com/100PCS-5mm-8000mcd-Super-Bright-Led-Bright-Blue-Light_W0QQitemZ320420929855QQcmdZViewItemQQimsxZ20090906?IMSfp=TL090906166001r32104
ooh, cheap. But 5mm means lots of soldering and layout thinking. Which might work out... We'll have to make a numerical analysis. :)
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