U.S. Philips Corporation

Everhardus G Berns

Johannes T De Hair

Johannes T Van Kemenade

A low-pressure mercury vapor discharge lamp having a very satisfactory color rendition, (R(a,8).gtoreq.85), a color temperature of 2300-3300 K and a color point on or near the Planckian curve. The lamp is provided with a luminescent layer comprising:

Low-pressure mercury vapor discharge lamp

A low-pressure mercury vapor discharge lamp having a very satisfactory color rendition (R(a,8).gtoreq.85) and having a color temperature of at least 3200 K. and a color point located on or near the Planckian locus. The lamp is provided with a luminescent layer comprising:

A low-pressure mercury vapor discharge lamp having a satisfactory color rendition (Ra.gtoreq.80), a color temperature of 2800.degree. K. or higher and a color point on or near the Planckian locus. The lamp is provided with a luminescent layer (4) which comprises

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Geldrop, Netherlands

Everhardus G Berns