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The Einstein uses an insulated gate bipolar transistor(IGBT) for power control, the WL uses voltage control; the Einstein's flash duration -- which is short to begin with -- will get shorter as the output is lowered; as short as 1/13,000 according to Paul Buff -- good for stopping action/movement. The WL starts at 1/600 and gets longer as the power is reduced.
I just noticed that the X1600 (also X3200) have a selector to reduce the unit to 1/4 power output. NOTE: This is DIFFERENT than reducing the power slider to 1/4. In effect, it transforms the unit to a 165 WS unit, which then shortens the flash duration. Subsequent use of the slider will follow suit with the flash duration lengthening, but it basically gives you the option to run the X1600 at reduced power with EITHER shorter or longer flash durations depending on which mode you are in. Not exactly IGBT circuitry, but interesting nonetheless.
Additionally, the modeling light goes 250W and it is fan cooled, and in an aluminum housing (4.9 lbs). This is the first time I really looked at the prospect of the White Lightning, previously assuming it was simply a "tired old dog" in the wake of Einstein and IGBT ... but I'm in the mode of "hmmmm" for the X1600 or X3200 (X800 doesn't offer the 1/4 power mode) to provide EITHER more power, or more speed.
Again, not IGBT, kinda old school workaround @ shorter flash durations (1/4 power mode)... but given the modeling light, fan cooled and aluminum housing ... might be something of interest that would otherwise be overlooked.
For those who have used the White Lightning series ... are the mounts better constructed than the AB's (same style I assume), or any other notable aspects that go "under the radar" in the wake of Alien Bee & Einstein commentary?
One more notable diff that could be of interest according to PCB website:
AB & Einstein = 2 Yr Warranty
White Lightning = 5 Yr Warranty