??HID Qestions??

i have a 175watt HID that is about 8in long and 4 in wide (wont fit in a regular sized socket). I have the (ballast) w/the socket it came with and this big ass magnet lookin thing at the back behind the light, and a disc shaped JL-202 PHOTOCONTROLLER that plugs onto the outside of the metal ballast. so my question is what is the magnet lookin thing and what is the photocontroller and can i do without this stuff and just stick with the socket. probably stupid questions but you have to start someware.

:rasta:

ok its a transformer still dont know about the PHOTOCONTROLLER, but there are 2 wires, black and white, how would i go about wiring this ballast up to get it working. thanx

Pictures would help.

Black is negative if that helps
One love
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