LOL, what grades you were getting for physics ?

Check this:
http://photography-on-the.net/forum/...d.php?t=565628
"So I am in enviable position to compare Genesis 400 and AB800 side by side. I do not have a color meter or even an exposure meter so the comparison is solely based on my unscientific experience with both units."
Methodology is questionable to say the least. I'll cover the reasons I bought the bees here:
Pros:
1. Very fast recycling. I have never missed a shot although I have a nasty habit of firing up a series of shots even in a studio setting

2. Cheap to maintain, has good warranty and customer service reputation

3. Power slider is maybe less precise but is easy and fast to use, even when the light is mounted high on a light stand

4. Nice cubic design that potentially fit into many cases and does not take much space

5. Very light
Cons:
1.
A notoriously misleading unit name, that tries to present the light higher than they are.
Only to people who don't know what they are buying into, ignore effective w/s and you're ok.
2.
Inconsistent color when dialing down. Even at 1/16 the images require color correction in post processing, which might be a hassle.
You do not want to use a grey card every time you change the light settings.
I don't mind. Takes seconds & much easier to do than PP
And using two lights at too different power might be impossible.
Might do, haven't done it, doesn't matter for me.
3.
Flimsy build(still unlikely to break at normal use.)
Feel lighter than they should, a lot lighter that the calumets. For me that's a bonus.
I know someone who's been using 4 bees on the road for 5 years and has never broken one.
4.
Weak modeling light. As corected this is not entirely tue
5.
Dead end units, meaning that If ever you want to grow you have little choice of using the same brand.
eh ? No idea what that's about. the AB 1600s are too powerful for most situations, the 400s are ok, the 800s are sufficient for most uses
although given the unsatisfactory colour temp results I've seen, if colour fidelity was of utmost importance I'd either buy another brand or hire a studio for the job.
The pros for the genesis lights are all good, it was the cons (and the not for pro use warning) that put me off:
Cons:
1. [
U]Recycle time is noticeably longer[/U]. After I switched from AB a missed a few shots before I learned to wait for the light, which I never had to do with AB. But it might be my shooting style, which I am eager to change.
Which would dramatically reduce throughput in some situations. I went for fast recycle times.
2.
Heavier and larger than AB units. I managed to squeeze three lights into a medium size suitcase.
Who wants to lug them around ? Not me.
When you've got studio lights & a spares kit, extension leads, surge protectors, reflectors, lighting stands, background stands
and a massive camera bag and you have to carry all that in and out of places on a daily basis, you
will welcome any
reduction in weight, volume or increase in portability. I've seen photographers using a sack truck for their studio lights, for example !
Most lights I've seen follow a similar format and look very samey, almost identical from the outside. I think that throwing away the perceived 'tube with a blub on the end' shape was a good thing.
3.
Flash duration is 1/250, which however rarely is a problem. Unlike Photogenic Studio Max III where the flash duration is 1/125 the Genesis units do not underutilize most popular cameras. You will start feeling it only with the most expensive cameras such as Canon 1D, which have synch speed of 1/500.
Higher sync speed is good.
4.
When dialing down the unit discharges the extra power by emitting a flash, which is annoying. The AB on the other hand discharges the extra power not using the light tube.
After the 1000th flash of the day, anything which makes for fewer flahes is good !
Papa carlo reaches the same conclusion as I did: "Just choose what is more important to you"
I did: Lightweight, compact, easy to transport, very reliable, very short recycle times, great customer service, and you can get them in
a bright
alien green casing which really
really annoys other photographers with their more serious (read proper) always black,
always metal, always heavyweight lights which
usually develop a small problem on day 2
As always, do your homework, buy what works for you.