(3) The influence of [Sr.sub.2][Si.sub.5][N.sub.8]:[Eu.sup.2+] concentration on the lighting performance (in terms of correlated colour temperature deviation (D-CCT), Colour Rending Index (CRI), Colour Quality Scale (CQS), and the
luminous efficacy) is investigated.
Luminous efficacy in daylight is defined as the ratio of illuminance to solar radiation that is expressed in Lm/W.
His latest invention is a blue laser, also convertible to white light, with twice the
luminous efficacy of an LED.
Luminous efficacy of LEDs that can be attained until 2015 is based on the expectation that LEDs will be able to attain 50 % to 70 % of the theoretical maximum.
The simulation program can predict not only the relative SPD, chromaticity coordinates, but also numbers of LED (N), drive currents ([I.sub.F]), the input power ([P.sub.in]), the luminous flux ([PHI]), and the
luminous efficacy ([eta]) according to requirements of CRI, R9, CCT, and the distance from the Planckian locus on the CIE 1960 uv chromaticity diagram (dC), with polarity, plus (above the Planckian locus) or minus (below the Planckian locus) [15].
Lumisil 885 is an addition-curing silicone rubber of medium viscosity that cures to yield a very transparent, high-durometer elastomer that confers high
luminous efficacy in optical applications.
Power consumption, luminous flux, correlated color temperature, CIE Color Rendering Index (CIE CRI) and
luminous efficacy of the luminaires were measured using an integrating sphere that measures the spectral power distribution in the wavelength range of 350 to 1050 nm.
GL-TL0606 brings with it a large improvement in
luminous efficacy and luminous flux when compared to T8 or T5 fluorescent fixtures.