I use this laser for leveling clear walls, cabinets with shelves, leveling floors and checking the height of doors and windows that I'm installing. This is an invaluable tool. I recently looked at the Wokeline Smart G self-leveling green cross line laser. Studies have shown that green is better than any other color both day and night. Some facts you may or may not know: Green lasers are more visible than red lasers in low light conditions. The human eye makes green appear brighter in brighter natural lighting conditions. I tested the wakeline laser and the Bosch red laser I used. The red laser was visible from about 15-20 feet in bright sunlight, but I have to strain to see the line. I don't struggle at all with the green laser in daylight. Both lasers were very visible in low light conditions. But green wins because of good daylight visibility.