Rotary Laser Level

For Outdoor Work

• Decent, but poorly visible in daylight. May work on cloudy day. [1]
• Reviews say it doesn't work in daylight for this - [2]
• Visibility outdoors - can see the reflection on white paper:

• Up to 50 feet visibility in shade with this plane laser on full sun day [3]
  • Picture outside under covered porch in Florida - [4]
  • Says it can work outside [5]
  • Says you could see it 26 feet away on overcast day - [6]
  • This one reviewer found in visible in bright sunlight at 25 feet - [7]
  • Full daylight (probably not sunny) visible at 30 feet - [8]
  • 20' visible in relatively bright outdoors, and 30 feet with included reflector - [9]
  • 50 feet in shade on full sun day - [10]. Most compelling review so far. For building walls - this would work well because shade can be created relatively easily, such as if laying wall panels, on the shaded side, and natural shade occurs on north side etc.
    • Use fresh batteries for max brightness [11]

Plane Lasers for Corners

This looks like the best choice, which includes a rotary laser for plane as well as corners. Don't get a plane laser if you can get this with additional squaring ability on 3 planes. A detector can be used as well, but this appears not to need one because it's visible in the day. This may also be a good idea with laser detectors on tractors/bulldozers for grading purposes.

• Green light = 4x visibility in day. Good for corners. $165. [12]

Rotary

• 13 best rotary lasers - topcon is $500 - [13]. MJ review - heavy D batteries are not good rechargeable option. Trip to the store when they run out - PITA. Though one can get rechargeable Ds.
• Huepar Self-leveling for $100 no detector - [14]. No detector, so difficult to see in full light.
• Huepar $239 with detector - [15]. Appears to be half the price of best brands and comparable quality. Has rechargeable bats.
• $89 rotary + 1 plane - [16]

Receivers

• Works with any red laser - [17]