Cord length on HQI ballasts

[Delphinus]

If the PFO ballast comes with that then it must be OK. If it works, it works. If the light doesn't turn on then you know it doesn't

I know that the technical specs for the Advance ballast say "BTL of 5 feet" but what that translates into exactly I can't say.

I know that with other pulse-start ballasts, without long-range ignitors, you can only get about 2' of cord between ballast and socket, otherwise the lamp doesn't fire (I know this because I tried it). 10' cord using the long-range ignitor, lamp works fine, using standard (ie., short-range) ignitor, lamp wouldn't fire. (It'd hum a lot, but no light.) The pulse must be sensitive to resistance on the line; I guess you can compensate using a smaller gauge, but I don't know how far you can push the limit.