Alan Rock's Trivia!

Questions:

1)  In "LED" (as in LED televisions), what does the "E" stand for?

2)  How do you indicate 50 in Roman numerals?

3)  Who wrote, "'Tis better to have loved and lost, than never to have loved at all"?

4)  Who was the Grateful Dead's guitarist?

Answers:

1) "emitting"

2)  L

3)  Tennyson

4) Jerry Garcia