This is what our supplier says:-
Cosmedico have produced the Rainbow lamp range.
0.3 compliant but with a maximum uvb in order to generate that all important 'Heat' Factor. Four colours in the range each with
it's own purpose:-
Electric Blue for High UVA tanning Performance.
Party Pink for Skin Rejuvenation and effective melanin production
Sizzling Yellow for Vitamin D Production
Rapid green for Relaxation, Good Health and Stress Relief.