Should I buy a Switchable MH/HPS ??

GOing To Be Adding a 400 Watt Switchable MH/HPS to supplement my 1000Watts of Floro/CFL mix.

THE BALLAST
<UL type=disc><LI class=MsoNormal>Die cast aluminum housing <LI class=MsoNormal>5kv universal socket assembly
<LI class=MsoNormal>Louvers for cooling<SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: Verdana">