More lighting questions/ballast/bulb combinations

[venkiw]

Steve & Delphinus are right,

M57 is a probe start ballast (also called TAR, CORE & COIL) and has just a transformer and condenser (does not include ignitor)

M137 is a pulse start ballast (Initially used for HPS bulbs) has a ignitor in addition to transfomer and condenser, a lot of european made bulbs need this to work.

So if you bought the M57 you should be fine since it is recommended by them, you migt have to check the distance between ballast and bulb (only a manufacturer can recommend this) as too much length may not transmit the heat to the bulb for it to start, a safe distance for TAR ballast is less than 8 feet.

Thanks

Venki