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Table 2 Calculation of the limit of luminous efficacy with different bases and all the related parameters and recipes

From: Packaging efficiency in phosphor-converted white LEDs and its impact to the limit of luminous efficacy

CCT CRI LER LEa LEb ILE ILEc ILEd ILEe Phosphor recipe
(4892) 29 466 308 263 237 213 142 107 YAG(G)
(5021) 46 454 303 259 233 210 140 105 YAG(G)
(4208) 34 458 296 252 227 204 136 102 YAG(Y)
(5519) 57 417 283 247 222 200 133 100 YAG(G)
(4501) 60 426 280 239 215 194 129 97 YAG(Y)
(6013) 60 392 270 237 213 192 128 96 YAG(G)
(6538) 62 372 258 228 205 185 123 92 YAG(G)
(4980) 63 392 263 225 203 183 122 91 YAG(Y)
(5539) 66 366 249 218 196 176 118 88 YAG(Y)
6018 68 350 241 212 191 172 115 86 YAG(Y)
6506 70 338 234 207 186 167 112 84 YAG(Y)
7032 71 327 228 202 182 164 109 82 YAG(Y)
5500 83 298 200 174 157 141 94 71 YAG(Y)+Nitride(R)
5000 84 295 195 167 150 135 90 68 YAG(Y)+Nitride(R)
4500 86 291 190 162 146 131 88 66 YAG(Y)+Nitride(R)
  1. aLuminous efficacy with counting Stokes loss only. bLuminous efficacy with counting Stokes loss, 4% phosphor quantum loss and geometry loss as a function of the CCT. cOUF is 90% for light bulbs. dOUF is 60% for automotive head lamp. eOUF is 45% for street light. Numbers in boldface put emphasis on taking ILE rather than LE into consideration for a light source in the practical lighting applications.