tar vs electronic?

[Invigor]

http://www.jlaquatics.com/cgi-bin/sh...gno=pfo-bh252q

is an hqi ballast an m80 by default? and are hqi bulbs all double end or single end as well?

and will a pulse start ballast fry a probe start bulb? or are they fine? I know a pulse start bulb won't run on a probe start ballast