New for 2021! Our solar floodlights (SFL) have received constant praise since the introduction of our first unit several years ago; since then, we've constantly updated them based on your recommendations. Our 2021 model has all of the great features of the previous unit: 2000 lumens, IP65 rated waterproof, solar powered, remote controlled, but now includes our A.L.T. or "Adaptive Lighting Technology". What is "A.L.T." A.L.T. (ALT) means "Adaptive Lighting Technology". With our previous 2000 lumen Solar + LED Floodlight, you could get a full 3+ nights of lighting on a single charge. Granted that in itself is an impressive run-time, but we've upped our game and created ALT to extend the run-time of our new light up to 10 nights!