The spectrum of my Philips MHN-TD ESS 70W/730
[img]https://i.postimg.cc/yN8RgXYC/IMG-8077.jpg[/img]
Dysprosium-Thallium-Sodium and small amount of lithium as an impurity from the quartz.

The spectrum of my Philips MHN-TD ESS 70W/730


Dysprosium-Thallium-Sodium and small amount of lithium as an impurity from the quartz.

6B177C66-D4BD-4A03-A046-F2116DB6C31C.jpeg ZLASTER_28129.JPG IMG_20190613_220204.jpg whites.jpg Philips_Technical_Review_v23nr8_9_1961_1962_recent_improvements_in_sodium_lamps.pdf
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