 
 <prompt> Wetin you suppose dey look out for wen you dey shop for lighting for your house? Given di last question, write a context wey contain di answer. E fit be 1 - 20 sentences. Context: <response>: ```An important property of light fixtures na di luminous efficacy or wall-plug efficiency, meaning di amount of usable light wey dey come out from di fixture per energy wey dem use, usually measured in lumen per watt. A fixture wey dey use replaceable light sources fit get efficiency wey dem go quote as di percentage of light wey dey pass from di "bulb" go di surroundings. Di more transparent di lighting fixture be, di higher di efficacy. If dem shade di light, e fit reduce di efficacy but fit increase di directionality and di visual comfort probability.``` 