Using Lanturn's "Blinking Lights" Ability, may I repeatedly look at the top card of my opponent's deck, even if the deck has not changed?
Yes, as long as it does not waste time or interfere with your opponent's play.
Source: Cosmic Eclipse FAQ (2019-10-18), TPCi Rules Team (2019-10-31)

Relevant cards

Note: All applicable cards may not be listed below.
SM12_72
SM12_72