The listings on ebay give you the lumens, which is about 100 X the wattage, but there is no information about beam spread or lumens at distance. With the original lumens, the lumens at distance should not be a problem. They tend to have a somewhat wider beam spread, because of the bulb placement in the reflector that was not originally designed to house them. I think, since you are in the stage lighting business, you are overanalyzing the project. .
Well yeah given my profession I do look at lighting more clinically :-)
Photometric 411 is what I use in selecting light source for work projects so was just looking if any of these LED bulbs had lumens/distance 411 vs just published lumen output from source
LED's have come a long way over the past 10 years. In my biz they had limited use initially as their output over any distance fell of considerably. Better chip sets and reflective enclosures have improved that considerably in recent years.
I now have TV and stage projects that are 100% LED source. Several TV studios have converted exclusively to LED...they went for the "green" electrical use tax card credit and WAY cooler studio temps using less air conditioning.
5600k is considered "daylight" color temp. That has a "whiter" appearance compared to incandescent, 3200k source
The Lumen output published for these automotive LED's is direct at source, not at "x" feet (distance) but yeah compared to incandescent or xenon type source they put out more lumen per watt and draw less amps
Not questioning these LED's now don't throw light brighter & further than conventional headlights, was just looking if any of the bulb manufacturers had photometric chart data like every lamp manufacturer does in my biz for lumens/distance. But it appears a picture or rendering of a "brighter" looking comparison against conventional source is all the layman consumer needs :-)