I have green lasers and in daylight the dot can be seen at 100 yards on white paper. The dot is barely visible, but it can be seen without any visual aids. With a scope it can easily be seen in daylight. This is a large 1 inch diameter by 5 inch long laser, with a large battery. Green lasers require over double the power of red lasers, and are much brighter, but are power hogs. My high power green lasers use rechargeable batteries, due to the power consumption. Some lasers are brighter than others, based on their output power. At low light or darkness the red laser "beam" can't be seen unless it is very humid, but the dot is highly visible on a target. In low light or darkness the green laser beam is highly visible and the dot is very bright. Neither the red or green laser beam can be seen in daylight. The laser beam is the laser light extending from the laser to the endpoint dot on target.
I prefer red in low light or darkness as the green is a little too bright for me. Red is hardly useable in daylight, but in daylight you really don't need a laser, that's why we have sights. The ability to see the green laser in daylight allows for easy zeroing of the laser. My red lasers have to be zeroed in low light to be able to see the dot, however for close distances of 15 yards or less, the red dot can be seen on white paper in daylight. I have red lasers on two SD handguns.
There are lots of different lasers on the market. I have a red Crimson Trace ($160) and a red LaserMax ($80) hand gun lasers, and both are about the same quality and work good. I tried a few low cost red rifle lasers and had bad luck with them. The green rifle lasers were purchased from an off brand maker (China) on Amazon. They only cost $60 each, are super bright and they stay zeroed with AR10 recoil. I only initially bought one, but it worked so good that I bought a second one. When you buy cheap, you often get cheap, I can attest for that. I was lucky with the green lasers, inexpensive and working great after a year and a half. The green lasers stated less than 20 mW power, and most lasers say less than 5mW. Less than 20 could be 5, but these lasers are super bright and their description stated can be seen at over 100 yards in daylight and over 1/2 mile at night. They were correct with the description.
Bob
