: a psychological condition or a relationship in which a person is controlled or manipulated by another who is affected with a pathological condition (as an addiction to alcohol or heroin) ; broadly : dependence on the needs of or control by another
If you are going to drain the crap out of a lead acid battery you have to do it fast, a light bulb won't drain it fast enough. The desulfation process involves trying to break off the buildup with bursts of high voltage, if you discharge it again you are just putting the sulfate right back on the plates. Once you get enough of a discharge on a lead acid it is highly likely it'll never be the same again. Even a desulfator can't get it all off.
Draining a lead acid down is bad for it.<---PERIOD