I agree Wayne, the low current LED is a more elegant solution and more in line with the K2's power conserving/QRP philosophy. Sverre LA3ZA > LEDs that work well down to as little as 1 mA in room > lighting are now widely available. That's why we didn't add a > DC current gain stage here. Try a "super bright" type, > available from Digikey, Mouser, etc.