A low pressure fluorescent tanning lamp ( 10 ) includes an elongated, tubular glass envelope ( 12 ) including an arc generating and sustaining medium ( 14 ) and electrodes ( 16 ) therewithin and having a first section ( 18 ) and a second section ( 20 ). A phosphor coating ( 22 ) is provided on the interior of the first section ( 18 ) and only a portion ( 24 ) of the second section ( 20 ). The phosphor coating comprises materials emitting in the UVA and UVB areas of the electromagnetic spectrum and additionally in the visible area of the electromagnetic spectrum in the range above 600 nm. The second section ( 20 ) includes a clear window ( 26 ) and the phosphor comprises a mixture comprising about 91% BaSi 2 O 5 :Pb; about 6% MgSrAl 10 O 17 :Ce; and about 3% Y 2 O 3 :Eu.
1. A low pressure fluorescent tanning lamp comprising:
an elongated, tubular glass envelope including an arc generating and sustaining medium therewithin and having a first section and a second section;
a phosphor coating on the interior of said first section and a phosphor coating on only a portion of said second section, said phosphor coating comprising materials emitting in the UVA and UVB areas of the electromagnetic spectrum and additionally in the visible area of the electromagnetic spectrum in the range above 600 nm;
wherein said second section includes a clear window in only a portion thereof.
2. A low pressure fluorescent tanning lamp comprising:
an elongated, tubular glass envelope including an arc generating and sustaining medium therewithin and having a first section and a second section;
a phosphor coating on the interior of said first section and a phosphor coating on only a portion of said second section, said phosphor coating comprising materials emitting in the UVA and UVB areas of the electromagnetic spectrum and additionally in the visible area of the electromagnetic spectrum in the range above 600 nm;
wherein said second section includes a clear window; and
wherein said phosphor coating comprises about 91% BaSi 2 O 5 :Pb; about 6% MgSrAl 10 O 17 :Ce; and about 3% Y 2 O 3 :Eu.
3. The low pressure fluorescent lamp of claim 2 wherein said clear window extends about 30° to 45° of the circumference of said envelope.
4. The low pressure fluorescent lamp of claim 2 wherein said lamp has a given length L and said clear window extends from one end of said lamp for a distance A which is less than L.
5. The low pressure fluorescent lamp of claim 4 wherein said distance A is about ¼ of said given length L.
6. The low pressure fluorescent lamp of claim 2 wherein said clear window is covered by an optically transparent metal oxide coating.
7. The low pressure fluorescent lamp of claim 1 wherein said clear window extends from about 30° to 45° of the circumference of said envelope.
8. The low pressure fluorescent lamp of claim 7 wherein the length of the lamp is from about 72 to about 80 inches and the clear window extends from one end of said lamp for a distance of from about 18 to 20 inches.
9. The low pressure fluorescent lamp of claim 7 wherein said clear window is covered by an optically transparent metal oxide coating.