There is something that u wudnt like that " The reflection geometry and the candle design performance of Cultus is very poor, where else suzuki's best headlight is of Alto, in both geometry and design OK"
now if u want HID in cultus, the brightness you want, would not be overthere as the lights dispersed in different angles.
And for which HID to buy, goto the link i uploaded along time ago
https://www.pakwheels.com/forums/car-entertainment-electronics-gps-navigation/90846-may-help-selecting-hid
otherwise, buy any HID