Two in One Ballast. Can be toggled with one switch from MH to HPS and back again. (Be sure to switch lamps when you toggle from HPS to MH)

10â?? Socket Assembly
Light Hood Reflector
2 Lamps Included -
-One Metal Halide 1000w lamp
-One High Pressure Sodium 1000w lamp. (This lamp burns at 145,000 lumens)
Hanging Kit
$276.00+sh

WHY is 400w more money?
have a feeling I do not not need that much light.... DO THEY !?!?
Is the 600watt more gonna cost much more electric?
subbing Hotlilux HPS 400w for standard...

10â?? Socket Assembly
Light Hood Reflector
2 Lamps Included
-One Metal Halide 400w lamp
-One High Pressure Sodium 400w lamp. (This lamp burns at 55,000 lumens)
Hanging Kit
$349.00+sh