History of Product Models
TDP mineral lamps have been sold under a variety of descriptive names and model numbers. Most model numbers are not representative of the device, and are used because the model numbers are historically familiar, although the lamp's construction may not resemble the original lamp with that model number. It is possible to find TDP mineral lamps also being sold as "bio-spectrum lamps," "FIM Energizers," and "FIR Lamps." Common model numbers include, but are not limited to, CQ-27, CQ-12, CQ-33, CQ-36, CQ-55A, CQ-222A/B/C/D, CQ-270A/B. Version numbers are sometimes used too. The Version 1.0 lamp refers to the original invention from 1978. Later editions in the 1980s (ver. 2.0) increased the size of the head to 6.5" from 4.75" and offered models with one head or two ]], and desktop editions. In the 1990s (ver. 3.0) manufacturers changed the manual timer to a digital timer.
Manufactures continue to modify the original design to gain market differentiation advantages. Changes most frequently manifest in differences between the timer, the stand, and the size/shape of the head. Recent experiments with the mineral plate are adding thickness of materials, since the (replaceable) mineral plate has an estimated life of 1000–1500 hours. When the mineral plate looks ash grey, it is time to replace it. TDP mineral lamp therapy has a billable modality number 97026 for doctors to bill insurance providers.
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