Strength & UV code
All tanning lamps are provided with a UV code. This code is also called X/Y code.
With this code you know what type of lamp it is. Strength and are indicated.
Here below the code of an example 100W lamp with reflector.
- 100 : Wattage of the lamp
- R : R = with reflector, O = without reflector
- 34 : This is the X code. This number gives the total UV strength (wavelengths between 250nm - 400nm)
- 3.9 : This is the Y code. This number represents the ratio between UV-A and UV-B. The higher, the more UV-B. So the character of the lamp. (Character)
A lamp with reflector has an internal white reflector. This type of lamp only gives light on one side, but with double power.
A reflector lamp therefore has an X-code almost twice as high as the same lamp without a reflector.
That does NOT mean that it is actually twice as strong! A lamp without a reflector gives at least the same performance in a sunbed with a good mirror reflector.