This is a poetic term that is sometimes seen in lyrics to pop songs but I've seen it in gospel and blues offerings as well. Sometimes it is spelled love-light and love light. It apparently means love energy or love vibration or love emanation or love expression.
Turn on the light, let it shine on me, turn on your love light, let it shine on me
_From Turn On Your Love Light by Deadric Malone and Joe Scott, performed by Bobby "Blue" Bland, The Grateful Dead and others
And I wanna know Baby when you're with me Who do you think you're fooling? Making me feel so sure Turnin your lovelight down again Why don't you let me be? You don't know what you're doing Making me feel so sure Turning your lovelight down again _From Lovelight by Robbie Williams