This is what a quick search reviled:
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Safe Use of Lead Crystal
<LI id=jsArticleStep1 itxtvisited="1">To reduce health risks, soak new lead crystal in vinegar for at least 24 hours prior to use. Hand-wash each piece using a mild detergent and then rinse thoroughly. Lead crystal can safely be used to serve most food and drinks during a meal, because no liquid will remain in the serving dish or container long enough for leaching to occur in an amount that exceeds the Environmental Protection Agency's standards. However, do not store port, cognac or other alcoholic beverages in lead crystal storage containers. Use lead crystal decanters only for serving. Fill decanters with alcoholic beverages prior to serving, and then pour the remaining contents into a lead-free storage container, such as the original bottle in which it was purchased. Lead crystal jam pots can be used safely in the same manner. Avoid serving children and pregnant women with lead crystal, as they are at an increased risk for the dangers of lead exposure. "
Now, what I want to understand. If the led comes out of the glass wouldn't that glass eventually "melt away" so to speak?