The formula is simple enough: Salman as a simple, good-hearted guy. The longing for a loved one. And a lesson on righteousness. All wrapped up in a border conflict. Kabir Khan’s latest, Tubelight, is a despairing mix of the 2015 American war drama Little Boy it is inspired from, and the bits that made Bajrangi Bhaijaan a seller. Tubelight flickers, but fails to light up.