Do they have designated colors or do they change color depending on the amount of UV absorbed?
828968
They have specific colors that quickly react to the sun otherwise they are like an clear off white
1818669
They might only have certain colors left and therefor you cannot choose which color you want. I got mine some time ago and really did not care what color it was because I was using it to water my herbs and it made no difference to me.
917825
I think it might depend on, not only how long they are exposed to sunlight, but also other environmental factors (humidity and bioregion). The manufacturer claims that UV protection is included in the manufacture of the product, but research that I did suggests that they will still begin to deteriorate in a matter of months. Ours were out in the open for most of an Oregon summer filled with moist dirt, and seem to be ok so far.
935393
Truthfully, have not noticed if it does, but would like to hear from others if the experience has been different. As to their effectiveness during the day and night time, no problem during daylight, but at night time a strong source of lighting is needed for the ones that I have if you want to be able to see anything. There may have been an improvement (?) after the ones that I purchased.
1508986
Don't have this exact color but the ones I do have change color with heat from kneading and playing with it. The glow happens after the product is exposed to very direct light.
505680
The label says artificial color, so I assume it does. Unfortunately it doesn't say what they used.
382515
They are black but depending on exposure to sunlight over time, it could fade a little bit.
1725193
I do not know for sure, but Per the Eplastics website The ePlastics OnLine Plexiglass acrylic plastic sheets including the Bronze and Gray acrylic solar control shades. - Note that the color, solar energy, and transmission values do NOT change with thickness. Color_______Solar Energy___Visible Light Colorless_______85%___________92% Gray 2064______36%___________25% Gray 2074______24%___________13% Bronze 2404____56%___________49% Bronze 2412____35%___________25% Bronze 2370____20%___________11% Not sure of the exact color, but this show that Polycarbonate sheets have some solar and light reduction even if clear.
807140
Like anything that is white they will absorb some colors. However they can be bleached and will be pretty again.
179688
No only a few. They need to be replenished per the instructions on the bottle when the color fades.
192839
UV has a light wavelength below that of the visible range. Since these lights are all within the visible range (minus the red which has part of it in the IR), there should be no UV rays.
870896
Mine have not faded too much. I have a set in the sun and one in the shade and the full sun chain is a little faded, but I am in South Texas so that is expected. Any bright colors will fade with sun unless the coating has a UV inhibitor added to the coating.
725543
They are still. However there are different settings for the colors. So they can change.
325710
Yes, mine are turning green from exposure to sun and water, but I rather like the change of the color, It gives it character and it isn't a particularly bright shade of green either.
846654
Yes. There is some UV protector on them. They will still yellow eventually though.
1630236
I forget which color is which but they have an orange glow. But they still work at zapping the pustules Bacteria and help to heal them fast. I really like this machine for a started . It is giving great results for my clients and great value.
2068056
Mine did over the summer. I really noticed it when I bough new ones for my patio furniture. But I also live a 7000 feet where UVs are high The material though has held up through high winds, hail and sun.