choader

One question unanswered is coverage area. The light meter reading is the intensity at that point, expressed in lumens. The light output is fixed while the area (grow area) varies and the light must be spread over that area. Seems like projection pattern would be important? That's why we see the lower readings between the bulbs

Agent86 - were the bulbs vertical or horizontal? (sounds like vertical) Might be interesting to do a plot on lumens over area. for example, your measurements were right under the light. How about an inch off center? 2", 3", ...........

While the EVL certainly puts out alot of light, it may cover a smaller area than an HID.

Just some thoughts.

Choader