Oh, that is nicely misleading. The combination of being totally awed by the close proximity to perfection implied by the misreading and being used all of SI fitting together like Legos completely got me (see downvoted comment below, I guess the yaysayers could be right once more - and even now I still think that a photon stream worth one Watt of power, constrained to the visual spectrum could be a very nice alternative unit for the value usually given in lumens).