G J Van Den Beld

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  • Ir W J M Van Bommel Ir, G J Van Den Beld, Ir W J M Van Bommel, Ir G J Van Den Beld
  • 2003
The two authors, the former with a university degree in physics and the latter with a degree in electrical engineering, joined Philips Lighting in the early nineteen seventies. They have since been involved in fundamental lighting application research in many different application areas whilst occupying a number of different positions within the company.(More)
The aim of this study was to compare the effects of polarized light versus nonpolarized light on melatonin secretion in healthy, humans (mean age, 25 years; N = 6). On separate evenings, each subject was exposed to four different light intensities (20, 40, 80 and 3200 lx) of both polarized and nonpolarized light, as well as to a control, dark exposure. Each(More)
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