Its funny how you've only been a member since Sunday September 3rd and you're talking the same brainless nonsense as TacoMac, same person eh?
First off, no. I have no clue who that is.
Secondly, he's correct. Wattage as has been said before doesn't stack. All it does is tell you the power that's being consumed. It says absolutely nothing about the actual amount of light being output.
So, no. 2 200 watt light fixtures do
NOT equal a 400 watt light fixture. The reason: a little thing called lumens.
Lumens determine the brightness of any given light. The wattage simply defines the power consumed to produce that light.
In his case, he's running very cheap Viaspectre fixtures.
Now, the fixtures are
LABLED as 450 watt lights. They're not. They are 200 watt light fixtures. The produce only around 12,000 lumens each. (which is why they're so dirt cheap to begin with.)
Now, lumens
are cumulative. So by running the two Viaspectras he has, he's actually getting 24,000 lumens with them.
To put that into perspective, a single 400 watt HPS will put out 50,000 lumens on average. So, in the end, a
TRUE 400 watt bulb will output just over
DOUBLE what his two 200 watt fixtures do for the exact same amount of wattage used.
So him sitting there thinking two "labled" 450 watt fixtures, that aren't even 450 watt fixtures, is giving him 900 watts of lighting, is stupid on a level I've never seen before.
Ever.