On Mar 27, 8:37*pm, Nick L Plate wrote:

Yes. *I believe the lumen figure to be taken as the light falling on a
point away from the lamp whilst a candela figure is that which is
emitted by the lamp emmiter(bulb or LEDs). *This would make any
candela figure innapropriate. *The lumen figure would also require a
standard test (set distace, within a set horizontal and vertical
deviation, stadard colour, within a lumen range).

No, lumens measure the total light output for a light source.

http://www.ledtronics.com/TechNotes/...tes.aspx?id=13 has a pretty
good explanation for these confusing units of measurement.
http://www.westsidesystems.com/rays.html has another one.

- Frank Krygowski