Because uv waves (ultra violet waves) are harmful to you, they could give you skin cancer or shorten your life
<span>Over a period of a few days, this fly will produce five or six batches of eggs. Female house flies favor damp, dark surfaces such as compost, manure and other decomposing organic material for egg laying. House fly eggs resemble individual grains of rice. Within a day, house fly eggs hatch into larvae, also known as maggots.</span>
hope this helps
1inch 2cm 8ft have a nice day and good luck!