BlissLights Spright Firefly Laser Light, Blue 30' x 30' coverage or about the size of 2 two-car garages. Replaces 4 standard landscape lights or hundreds of feet of rope lighting. Uses an average of just 3 watts in temps above 55F (8 watts in temps below 55F). Our design has created a light that is more efficient than LED technology and has a 7,000 hour lamp life, which means the lamp will last an average of 4.75 years if used for 4 hours every night. Nighttime operating temperature of -15F to 90F (Allow 15 minutes for built-in heater to start in colder temperatures).