How Light Works is currently streaming on TubiHow Light Works (2023)DocumentaryRating 0/100Cast: Michael SmithDirector: John SmithWhere to watch: TubiCountryArgentinaAustraliaAustriaAzerbaijanBelgiumBoliviaBrazilBulgariaCanadaChileColombiaCosta RicaCroatiaCyprusCzech RepublicDenmarkEcuadorEl SalvadorEstoniaFinlandFranceGermanyGreeceGuatemalaHondurasHong KongHungaryIcelandIndiaIndonesiaIrelandIsraelItalyJapanLithuaniaMalaysiaMexicoMoldovaNetherlandsNew ZealandNorth MacedoniaNorwayPanamaPeruPhilippinesPolandPortugalRomaniaSerbiaSingaporeSlovakiaSloveniaSouth AfricaSouth KoreaSpainSwedenSwitzerlandThailandTurkeyUkraineUnited EmiratesUnited KingdomUnited StatesVenezuelaVietnamAvailable onFreeTubihdRent or buyRent or buy on Amazon