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• CRI vs. CCT relation:<br />
� Boundary behavior between<br />
1500 K and 2200 K is due to LER<br />
≥ 300 lm/W restriction.<br />
�� BBoundary d bbehavior h i after ft 2200<br />
K is fundamental behavior.<br />
• CRI vs. LER relation:<br />
� Boundary behavior is<br />
generated by combination<br />
of the trade-off between<br />
CRI vs. LER at different<br />
CCT values.<br />
Parametric study<br />
• LER vs. CCT relation:<br />
� Cooler white light sources<br />
are required to obtain<br />
optically efficient white<br />
light.<br />
� Boundary is shaped by the<br />
CRI ≥ 80 restriction.<br />
T. Erdem , S. Nizamoglu, X. W. Sun, H.V. <strong>Demir</strong>, Optics Express 18, 340 (2010).<br />
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