You might be able to find more info at the Virtual LED
Museum:
http://ledmuseum.home.att.net/ledleft.htm
It looks like this is going to do the trick. I may have to
throw out the ammeter on my el cheapo power supply.
(And subconsciously I may still be not accepting that its
possible to get so much light from so small a wattage.)
Thanks!
John A.