pathan to dukandar:give me black bulb

pathan to dukandar:give me black bulb dukandar:what is black bulb 
pathan:ullu ke pathe jab rat ko andhera hota hai to hum roshni wala bulb istamal kartay hain
 mujhe ab andhere wala bulb chahiye takay sabah mein sunay ke liye andhera kar sakoon