It is true that most of the world's urban areas are becoming larger, with megacities like Delhi, Jakarta, Shanghai, Beijing and Manila adding more than five million people in the last decade and most other urban areas are growing, but not as fast.
1 With professional installation, a central vacuum system can cost $800-$4,000, but averages about $1,200-$2,000 for new home construction (or as part of a remodeling project where the walls are already torn open) and $1,500-$2,500 for retrofitting an existing house.
The Acebeam X65 shines with and impressive 11,500 lumens. It has throw distance of 1150 meters and costs around $500. The brightest compact flashlight is the Olight X7 Marauder. It has a brightness rating of 9000 lumens, and costs around $160. The brightest headlamp is the Lupine Betty Rx14 â it shines with 5000 lumens and costs around $1095. The brightest flashlight that uses AA batteries is the Nitecore EA81.