luminous efficiency

19 LETTERS · STARTS WITH L

luminous efficiency is a valid 19-letter word worth 33 points in Scrabble and 40 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

L1U1M3I1N1O1U1S1E1F4F4I1C3I1E1N1C3Y4

1 + 1 + 3 + 1 + 1 + 1 + 1 + 1 + 0 + 1 + 4 + 4 + 1 + 3 + 1 + 1 + 1 + 3 + 4 =33 PTS

DOUBLE WORD → 66TRIPLE WORD → 99

MEANING

What does luminous efficiency mean?