Ballast Question

[dirtyreefer]

I know you guys have seen this question posted many times, but I can't find the original thread that had the same questions.

For MH ballasts, I see the JL (for instance) carries HQI, TAR, EYE and electronic ballasts.

Can somebody fill me in on the differences between these ballasts? I'm pretty sure Stircrazy Steve answered this the last time, but can anyone help distinguish between these or point me to the original link that has this topic?

Thanks guys!