Tim,
That is not completely true. There is no company in the US that makes there
own bulbs directly. We use our own phosphors for all our lamps so that we
can control the colors. As for the colors being different. We use a
phosphor that peaks in the 420nm range not the 460nm range. We did this
because true Actinic lamps are in the 420nm range. The chlorophyll A
absorption spectrum peaks at the 420nm range and this is the most common
pigment found in zooxanthellae. With all this the lamps do not appear to be
as bright due to the lower 420nm range, but they are giving off the same
amount of energy, we just can not see it.
Hope this helps.
Dave Troop II
Energy Savers Unlimited, Inc.