HQRP High Power Upgrade Bulb 3W LED RED Light Wavelength 625nm~635nm 7-30V for Milwuakee: #49-81-0090 / #49-81-0012; M12 / M18 / M28 plus HQRP Sun Meter

HQRP led bulb was specially designed to emit red light 625-630 nanometer wavelength!
You can easily replace regular bulb in your flashlight with this one. That will allow you to use it for different purposes!

This Bulb will allow you to replace the old light bulb in your flashlight, thus extending the battery life! Indeed, LED lights consume much less power than the standard incandescent bulbs or gas-bulbs in flashlights, and it will let you save on the purchase of new batteries!

Red Flashlight is perfect for when you have to read or focus in the dark and you don't want to loose your night vision.
~ Nice for looking at star maps or for maintaining night vision with general use around the campsite;
~ For use with red-light readable topographic maps;
~ Night-time astronomy;
~ Sea Turtle Night Patrol;
~ Perfect for "Star Party";
~ Walking After Dark!

Also:
Many animals are not naturally susceptible to certain types of light. Dogs do not make any difference between red, green, orange and yellow, it's all the same color to them. Shades of red and greeen are not visible for a cat's sight. Such animals like bulls, cows, sheep, pigs, rabbits, and wolves don't ditiguish red color that well. The hedgehog sees only shades of yellow and brown, and that is no accident as this is the color of worms, hedgehog's favorite food, but it doesn't see the red color.The red looks like black to bees, and golden hamsters don't distinguish any colors at all.

HQRP UV Meter: This meter shows you the level of UV and helps you protect your eyes and skin from negative sunlight effect. The color of the meter changes from very light purple to dark purple depending on the intensity of the UV lighting. The darker the purple color is, the more intense is the UV lighing.