text: main toh soch rahi thi,kya hum apne ghar ke bahar ek motion sensor light laga sakte hain, isse raat ko sab kuch visible rahega!haan, yeh toh zaroori hai, kyunki andhere mein koi bhi ghusne ki koshish karega toh light on hote hi pakda ja sakta hai, kitna smart hai!