Lumatek revisioins

What are all the revisions to the lumatek ballast?

what is the latest/ greatest?

what is the latest and greatest lumatek 400

Well, now they are all Dial-A-Watt AFAIK, and they have a DC outlet (though I've never used it). They are RF shielded, which is good as digital ballasts can interfere with other electronic equipment (radios, speakers). External breaker system in case of outages, surges. They run cool and silent (no internal fan required).

Check out the Lumatek website for more detailed technical information. Any new Lumatek you buy from a reputable dealer should be the latest hardware and they all have a 5 year warranty.