If you mean DEA, that's the Drug Enforcement Administration. That's the federal agency responsible for enforcing laws and regulations governing narcotics and other drugs.
From Wikipedia: LED: A light-emitting diode (LED) (pronounced /ˌɛliːˈdiː/[1], or just /lɛd/), is an electronic light source. The LED was discovered in the early 20th century, and introduced as...