Truglo Micro-Tac Tactical Micro Laser, Green - $114.59 + Free Shipping (Free S/H over $25)

Studies show that our eyes see green better than any other color in both day and night. But green lasers also have limitations.

On a bright, sunny day the green laser would have limited visibility beyond 15 yards. And, since you wouldn’t use your flashlight outdoors on a sunny day, chances are you probably wouldn’t need to engage your laser sight either.

Also, green lasers won’t function properly in freezing temperatures. In fact, the temperature range is from 40 – 100 degrees Fahrenheit. That’s something you need to know, particularly if you have a green laser sight on a rifle you store in your trunk and you work in a town that has cold weather.

Green laser light also has a different wave length than red light.

Green is closer to the center of the visible spectrum, at 532 Nanometers, so it's easier for our eyes to perceive the color vs. a red laser at 635 Nanometers. (Note: 520 Nm green lasers, like the TruGlow here, are typically found in low end sights, as it is harder to generate laser light within a window that starts off at the 532 Nm level. It does make a difference.)

As you might imagine, the lower wave length is what makes the green laser more visible. In fact, a green laser can appear as much as 50 times brighter than the red equivalent.

532 Nm is the ideal wavelength to maximize visibility during day or night.

I find the green lasers more visible in room light because the ambient light from incandescent bulbs is skewed towards the red end of the spectrum.

I'm using a red laser, but may try the TruGlo in place of it, to see if it improves my performance under different conditions

A red laser uses a red diode. A green laser uses an infrared diode and pases the beam through two crystals to make it green. Extra parts + extra effort aligning crystals = extra cost.