http://www.spectro-aras.com/forum/viewt ... f=8&t=1850
a test of a high temperature halogen lamp, the model SOLUX 50W 4700K 17°

The flux gain is 76% relative to a conventional 3800K lamp when comparing the signal measured at 6600A and 4200A.
The 4700K lamp produces as expected significantly more flux in blue / UV, excellent news for calibrating our spectrographs
more efficiently and easily in this part of the spectrum.
J'ai acheté ces lampes en France auprès de la société STRASSELEC (environ 12 euros pièces - marque EIKO)
https://www.strasselec.com- bon service.
Christian B