Spectacle lenses, depending on the type of material will absorb varying amounts of ultraviolet light. In order of best absorbing lens the materials are polycarbonate, plastic and finally glass lenses. Different standards define the amount of absorption required, and/or the definition of the categories for spectacle lenses. The amount of UV absorption is also influenced by tinting, dying and lens coatings.

Ultraviolet (UV) Light, like Visible Light, represents a portion of the sun's electromagnetic spectrum.  Ultraviolet Light occurs at wavelengths between 100 and 400 nanometers (nm) whereas Visible Light occurs between 400 and 700 nanometers.  This makes it the wavelength of light immediately beyond the violet end of the visible light spectrum.   Ultra Violet Light is invisible to humans but may be seen by some animals and insects.

No, we don't use UV lights. Again, we feel that they are unnecessary. If you follow all of the steps of the Aquascape Ecosystem and get enough plants, rocks, gravel, not too many fish and are putting the Aquaclearer™ Bacteria, you won't need the UV light. We rarely ever have green water in our ponds that we build, and most of the time it clears up with in a couple of weeks. UV lights will do nothing but get you into a cycle that works against nature instead of with it.

No, you don't. The reason for this is that once the product water comes out of the watermaker it goes directly to the boat's fresh water holding tanks. There is no control with respect to the quality of water that is already in the holding tanks because not only are the tanks fed by the watermaker, but they are also fed by dockside fillings from shore and there is also a vent tube from the holding tanks which invite the potential for contaminants to enter the holding tanks through the vent tube.

The P.I.R when exposed to that rays has no effect since the facers protect the foam from UV degradation.

These lenses absorb less heat and therefore their performance (i.e. focusing efficiency and lifetime) is better. Thermal Lansing is reduced, and therefore the focus position during operation with a high-power-laser is more stable. Since thermal effects also increase lens aberration, increasing the spot size, the spot size of a black-coated lens during operation in a high-power-laser is smaller than the spot size of a conventional lens.

Yes. Ultra Violet light has been linked to cause cataracts, macular degeneration and other retinal diseases. When you wear a dark colored lens in-front of your eye, this allows your pupil to open wider and allow more harmful rays into your eye.

Answer: We encourage the use of good quality sunglasses with total ultraviolet protection to protect the eyes and surrounding tissue. Several good studies have shown that blocking UV light protects you from certain eyelid tumors and protects the eye from cataract formation and macular degeneration.

Of all known substance, only glass can filter out ultra violet rays. GLARE Professional Polish contains Glassplexin?, and Glassplexin? has the properties of liquid glass. When being applied to the painted surface, Glassplexin? actually turns to glass. These glassy shields filter out 97% of the ultra violet rays and, hence, stop oxidation.

No, UV will not affect the performance of the silicone. NuFlex Firestops can be used indoors or outdoors without concern.

Carley Lamps provide almost no UV light. Carley lamps transmit Infra Red light out to roughly 3+ microns, and Carley I/R Sources transmit well beyond 16+ microns. Carley Lamps has several styles of replacement medical lamps and normally can produce any style we presently do not carry. If you can send a print of the lamp in question or even a burned out sample, this will help us to determine if we can produce it.

Ultra-violet Sterilizer actually kills algae as it passes through the light emitted in the exposure chamber. The UV light is the surest way to rid a water garden of green water. Water gardeners who have a large quantity of large fish, or choose to use fewer plants than recommended, find the UV the best way to control single-cell algae. For the clearest water, use an Ultra-violet Sterilizer with a pre-filter flowing into a biological filter.

SPD SmartGlass™ windows, skylights and sunshades significantly block harmful UV light up to 99.5%. Yes. This is another of the major advantages of SmartGlass International technology, particularly when one desires to use it for weight-sensitive applications (e.g. commercial buildings and aircraft) or applications where using plastic instead of glass for strength, flexibility and durability is important. SmartGlass International can supply varying grades of scratch resistant polycarbonate.

If the answer is yes to any of these questions then you could benefit from a pre filter from the solution.

The short answer is that this filter removes algae so your pond will not get green. The solution filtration system is the first mechanical pressurized filter that completely filters out all algae's that create your water to turn brown or green. This system creates crystal clear water without any chemical or bacteria's added. No ultraviolet needed. The flow rate to kill anything other then algae is so slow that the light starts losing its effect on the algae.

Optical whitening or “brightening” agents are used extensively in the paints, plastics, and textiles/apparel industries to brighten colors and make whites appear whiter. They work by absorbing energy in the UV region of the spectrum and re-emitting that energy in the visible (usually Blue) region of the spectrum. Anyone that has seen a white shirt “glow” under a “black light” has seen the effect very clearly.

No the best bet is to find a local professional electrician to do the job properly. However it is not a necessity to do during the painting as I bring my own light to work with........... So it is possible to show you the final result. After completion or even during the process the lights can be fitted again. I provide links of companies that provide the best lights see the links page

The primary usage for a UV light is to disinfect filtered water at a certain flow rate. Bacteria, viruses, and other microorganisms are destroyed by the UV interfering with the DNA and RNA in the organisms' reproductive cycles. If you are on a municipal water system (chlorinated tap water) in the U.S., chances are you will not need a UV light on top of our Ultra RO System.

Absorption chillers use heat and a chemical solution to produce chilled water. A gas burner is usually used to produce the heat with a mixture of lithium bromide and water as the chemical solution. Recovered waste heat in the form of hot water or steam can be used to power an indirect-fired absorption chiller (they use electricity for solution pumps, but only a small fraction of the electricity that electric motor driven chillers require).

No, sorry. Reverse osmosis does the best at filtering ultra violet and o-zone does the best at disinfecting. Softeners remove calcium and magnesium. The closest we can get is to recommend a Whole House Reverse Osmosis System.

Probably not, the mains water supplied in the UK is food grade quality 24/7 most mains water is therefore perfectly safe to drink. All that we suggest is that you may want to improve the taste of your water using a carbon based water filter which is capable of reducing or eliminating bad tastes, odours and chlorine.

Chelated and colloidal particles are far too large for cell assimilation in the body. These particles will be caught up in the blood stream and subsequently deposited, building up in various parts of the body, contributing to diseases such as kidney stones, bone spurs and hardening of the arteries. Toxic buildup of colloidal minerals such as lead and aluminum is known as heavy-metal poisoning. The body’s ability to utilize a mineral is primarily a matter of size and solubility.

ULTra stands for Urban Light Transport, an innovative form of PRT (Personal Rapid Transit), which is a system of driverless automatic pods travelling on their own guideway network, available on demand to passengers.

About 60% of the liquid zeolite you ingest binds toxins in the bloodstream and at the cellular level. The remaining 40% stays in the intestinal tract, where it helps to protect the body from toxic absorption. We don't know yet. However, since depleted uranium carries a positive charge, liquid zeolite theoretically should remove it from the body.

The body can only absorb 500 mgs of calcium at one time, so it is important to space your calcium intake throughout the course of the day. Ideally this means giving your body time to digest and absorb calcium from meals and supplements by spacing intake 2-4 hours apart.