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-   -   tanning bed compare to sun? (http://tantalk.com/general-tanning-industry-discussions/2350364-tanning-bed-compare-sun.html)

Carolina_Girl 08-16-2005 10:44 PM

what does the time you lay in a tanning bed compare to laying out in the sun? When you lay in the tanning bed for 14 min. if you laied out in the sun would it be about an hr our two....? I had a customer as me today? I have no clue? Does anyone know about this? **She lays in a 14 min bed with are and facial tanners in them...28 bulbs!***

mr belvedere 08-16-2005 10:58 PM

I would hazard a guess and say, on a clear day, during peak hours (11am-1pm) she is getting approximately equal to one hour of exposure outside in a 20 minute exposure. I seem to remember hearing that somewhere, but the source escapes me. Hope this helps. Good luck.

OASIS BEACH 08-17-2005 07:55 AM

Indoor tanning and outdoor tanning can not be compared. Two different animals as it were. If you would like me to go into detail let me know.

downtownbrown 08-17-2005 08:24 AM

There is really now way to compare the two. When you tan out side your in a completely uncontrolled enviornment.

Carolina_Girl 08-17-2005 09:15 AM

Thanks yall for the info

Neon Beach 08-17-2005 09:19 AM



I agree, the uv exposure obtained from the sun has so many variables to make it easily compared to the controlled environment of a tanning unit. Time of day, cloud cover, geographical location, etc.........

tropicgirl 08-17-2005 12:24 PM

If I remember correctly, smarttan says tanning indoors is the same as 3 to 4 times that amount in the sun. I think that would be for a 20 minute bed, eg. 20 mins indoors=60-80 minutes outdoors. 10 in a 10 minute beds would be the same.

Neon Beach 08-17-2005 12:33 PM

Outdoor vs. Indoor Exposure:
The Difference

You’ve probably heard this common mis-statement, “One indoor tanning session is like an entire day at the beach.” It’s a misleading statement. The statement assumes that because the UV intensity of indoor tanning units is greater, the skin is automatically overexposed. Here’s where the statement goes wrong: Intensity alone doesn’t illustrate the whole picture.

When determining exposure, the formula is this:

INTENSITY X DURATION = TOTAL EXPOSURE

INTENSITY: The average low-pressure tanning unit intensity is approximately 12 mw/cm2. (Milliwatts per square centimeter is one way to measure the intensity of energy emitted by the equipment.) By contrast, the intensity of the average noon summer sun in the Midwest is around 4-5 mw/cm2. Obviously, the intensity of the indoor tanning unit is greater than that of the outdoor Midwest sun.

DURATION: Now consider that even though the intensity of the indoor unit is greater than the outside intensity, the time spent in the unit is far less than the time most people spend in the sun. Duration spent in the indoor unit is 5-20 minutes. Outdoor duration, however, is much more variable. One might spend five hours on the golf course, or even an entire day on the beach. Usually we spend considerably more time at our outdoor activities than the time spent in a tanning unit.

TOTAL EXPOSURE: Remember, total exposure (the total amount of energy received) is a product of both intensity and duration. Since the indoor dosage is designed to be a sub-burning dose using a formula that says you will not sunburn based on your skin type and exposure schedule, indoor total exposure is likely to be less indoors than outdoors.
The important thing to remember when comparing indoor UV exposure to outdoor UV exposure is this: What matters is how much total exposure you get, NOT how fast you get it.

Factors Affecting UV Levels Outdoors

Outdoor tanning is a much less-predictable experience than indoor tanning because the level of UV radiation that reaches the Earth’s surface varies, and depends on quite a few different factors. Each of the following can influence the risk of overexposure.

TIME OF DAY: You’ve undoubtedly been told that risk of outdoor overexposure is greatest between the hours of 10 a.m. and 4 p.m. This is because the sun is at its highest in the sky around noon. This means the sun’s rays have the least distance to travel (their path is direct) through the atmosphere and UVB levels are at their highest. In the early morning and late afternoon — before 10 a.m. and after 4 p.m. — the sun’s rays pass through the atmosphere at an angle, which increases the “length” rays must travel through the ozone layer and, therefore, greatly reduces the intensity of the rays that eventually reach the Earth’s surface.

TIME OF YEAR: Because the angle of the sun varies with the seasons, the intensity of UV rays is affected. As you know, UV intensity in North America tends to be highest during our summer months, when the sun is “highest” in the sky.

LATITUDE: Of course, the sun’s rays are strongest at the equator, because the sun is most directly overhead and UV rays must travel the least distance through the atmosphere. Ozone also is thinner in the tropics. UV rays at higher latitudes — closer to either the North or South Poles — must travel a greater distance (again, because of the angle) and must pass through greater concentrations of ozone, so those in higher latitudes are exposed to less UV radiation than those near the equator.

ALTITUDE: You’ve probably heard that skiers have a high risk of overexposure. This is true for a couple of reasons and one of those reasons is altitude. At high altitudes, UV intensity increases because there is less atmosphere to absorb the damaging rays. As a general rule, UV levels increase with altitude at the rate of 2 percent for every thousand-foot rise in altitude.

WEATHER CONDITIONS: Cloud cover does reduce the amount of UV that reaches the surface of the earth — and therefore your customers — but it does not eliminate it. It is possible to be overexposed to UV radiation on a cloudy day.

REFLECTION: Reflection is the other reason that skiers (and we’re using skiers just as one example) are at higher risk for overexposure to UV radiation. Some surfaces, including snow, sand or grass, reflect UV radiation, increasing UV intensity. Fresh snow is reflective at the rate of 30 to 60 percent while sand is reflective at the rate of 15 to 25 percent; the whiter the surface, the higher the UV level.

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ALOHATANCA 08-17-2005 02:13 PM

Quote:
On 2005-08-17 12:24:00, tropicgirl wrote:
If I remember correctly, smarttan says tanning indoors is the same as 3 to 4 times that amount in the sun. I think that would be for a 20 minute bed, eg. 20 mins indoors=60-80 minutes outdoors. 10 in a 10 minute beds would be the same.



Nope there can no comparison due to such an uncontrolable outdoors invironment .

SLWTBOY 08-17-2005 06:11 PM

How many oranges are on the apple tree? Comparing indoor tanning to outdoor tanning is like comparing apples and oranges or non-reflector lamps to reflector lamps. You just can't do it. Which lamp are you going to compare to the sun? a lamp that contains very little UVB or UVA, or one the contains alot of UVB or UVA? As we all know we have choices (sometimes too many) on the strength of the lamps.


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