Hey stewie, I wouldn't try to run a 600watter in a C-13
cabinet, they're too high maintainence for the C-13.
The 400 watter is the perfect HID for the C-13. It'll
give you 50++watts/sqF. Which you'll love.

Zandor is right about the cooling method. An aircooled
hood with glass shield is a must for the 400watt sorry.
The vortex power fans are great for this situation, I meyslef don't have one yet,
but soon will.
Right now I"m running a 265cfm hydrofarm blower which works
great. Now my cab only runs with a 250watt hps, yet I"ve heard
it can keep it cool with the 400watt as well .

What I would do if I were you, is look into a vortex somwhere
in the range of 200cfm, not only can you keep your whole cab
cool with that bad boy, includes venting your light, but it requires
about half the power a dyton or hydrofarm blower does.
To give you an idea, my hydrofarm blower requires 250watts of power.
A 200cfm vortex requires around 175watts of power. HUGE difference
when it comes to the total project consumption of electricity
Good luck and great choice with your choice in a cabinet.

Two yeilds out of that cabinet got me 1/2 pound, with a 250watt hps.
peace.