CINXE.COM

<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,Noto Sans,sans-serif,Apple Color Emoji,Segoe UI Emoji,Segoe UI Symbol,Noto Color Emoji}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;max-width:60rem;padding-left:1.5rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{font-size:1.5rem;font-weight:500;line-height:2.25rem}@media (width <= 720px){.h2{font-size:1.25rem;line-height:1.5rem}}#challenge-error-text{background-image:url(data:image/svg+xml;base64,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);background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme:dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="120"></head><body class="no-js"><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt={cvId: '3',cZone: "publications.waset.org",cType: 'non-interactive',cRay: '9135d4161fa2fe0b',cH: 'QuP1Xh.MbM0eKgwUYw.HH0MhOkiHvJ.1Srxhv6EwqOY-1739795843-1.2.1.1-Ny_thIi3M.wAF_Dz.hZN4QqYWhLMs_kfdum6Exue3AM9wiwHXuCkVrQzTSJtJF_Q',cUPMDTk: "\/abstracts\/search?q=vertical%20illuminance&page=39&__cf_chl_tk=YwFhkIJ3GI7TL0K5B6gHRZXhD6iQELhrGi0ZnAG1FJA-1739795843-1.0.1.1-6I_ERQNw12L9Hzuf0E5eXORMoOyY9LHe1pZXLnTPnZo",cFPWv: 'b',cITimeS: '1739795843',cTTimeMs: '1000',cMTimeMs: '120000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/abstracts\/search?q=vertical%20illuminance&page=39&__cf_chl_f_tk=YwFhkIJ3GI7TL0K5B6gHRZXhD6iQELhrGi0ZnAG1FJA-1739795843-1.0.1.1-6I_ERQNw12L9Hzuf0E5eXORMoOyY9LHe1pZXLnTPnZo",md: "_CbB4fLcJ7kg1zXq6hI.HTfRULSiMR8_0dm6GNrWVrw-1739795843-1.2.1.1-68XUYnrnZFT1rQ1NcahD.IYGMeJQ6Q9VMWWb5eV1kj7R6Q9SUMcS9BT_WlYX5I_LkhPG_ViT3GvMQ0y6XHe2Im9l9l4bMzEl_6H2B0vgG.YQkPq2vmWYo9XI8JJm241CJMjM1V4pF1pHRcNsrUEey3MP8pb2p8LUw3_3grespiD9eqbIC78L9JxN1zyeoyTCIYAJB1emmNTjY7L.CehVx4Q0Qd0TyDDcDNBos3GlqSJQ4Fi2wnbE0DXGA3_QB7AiTaR9O4TTF.DFr3SPfUvpWfpYwIeFcntuRyJuOtPM9FyQ2BLYcrqFNyfvCLfVgYavJ9KO6NMEFSy7DcMTcEj65r6rml1qDc1Hr_G3FwGM_hnHFKlkFQmDs961nKeXTIcPcVbhZflGotNkuiN3n2CU4AgMImleyX_WZqCsOhneaIzxXf.PWW7J4jwfPfTjbWgyR43DgcqHMwv9KQiza6xX7GlZWUTw8.NF4rNrpIS4bCctJhSkhSnsfTEtPhLQDc5o4qsD1HTGzwWWokw5SSFXIPN9dKSwQiBrCdg4.hP4Q8AIEv514w2aOpgIg_Mm8VCUFKvj9ONokt2xsRDMtuCyx7SZtiLXKXuj2D38qDD4pp0r8lHrXCa0zABIBWs9K.uOthRrZd58c6yhP7fsB1xjJD31r7qOLuwofMq2IIfAMCfQq5fOyQZMghMKaeKeG6vNu4XCowhtS1scytBE_oJ7spO7HNTAllDep6T73goQSZ4yFBH0VLIjyNFWoZnDJWwDuIHUeBo1daMerhCvQ7aeNBgvDd0z63ZRU2ZHTmN8o3buPeSiHgImy4Uf.Jm3X9fp4a5TK._K8i1Mcicq7OQnjbRkYhQG5yeEig7bQkuXmoYG_CSV4qtKEK3uKqdxBN_7UNg_ssqzb26bMs3vTRJJBCXydtM4zyx1DFkShaj6HIgKZmER_Xrh8FmHo.Rs6YkAkmzQvAhKhHhAfXp1sEHQYYdEqaOHDDDQ4739yolgCu0TsaNKNmQE2UHwYto.2efVsiytm8wGXJ2vW4jtE5z9vNVp430Syq07.EE4azSWLnE3pQ.GqN_QgTEHPJg.uLVkaFspowGDzkRbcPkFxZpZFhZPRGJGRzXclR.SseXHPlnFa8YJt_tcIUaaLvKFRg8.yRilstiMli9wpeMUW1El9JU.02BCPkvQb839YHj00loDJWy6JB4iHC4P2dfeNoY3FoClw_5MXEXjulCykwYU94Dsnbl4DqdCXvKZe0TOPO16KsfPtiMhpxWut0J5iolnJmYqEatOClwuMSBy7pCz9cg198_sfWg01RLMRxdQpQ67E8X20b_tYc7cUMo6hSCRq_PAXY0BbMjWTnW_uVROGnzhIPD_gTQDmwO.Y3n0J1AIrqDoqallv59WHcyzI00A2BRDCPviH8cpI2w5DkrGE45iEJw4pz_SWGdsvHCucSBaJAdMpZDZuLopog_G7fuFYu5GJPU9DIHEHd_iWfiBzo5ILSA0.O5XgZ7cONv..XkdVrkWrih5S3Gv3D8mw9P2iTKmIP2wd.qfPWQN7XjOFoeNTq2QF9IsNj6dReb2dHjCWzCi92Q_vSEJwJnKNjAE9hLvLKtuy14rpprYAZloKcxcfQvRsBkoq86swEo8UXOoN8isU.0oKoyAargmcJZAWaXaLmW6V6NcFM7w1GRsLjNVAnzzgROKoFWCSHR7PRkEoTw4VJzXxE3Sin1tCCzmO.2iRJgJZHmT643Muo15uqvqOG.h0MfIGWNIq6J6RldFtswQeuMakMLUsnuCaI8kydydvtjNHwtME5f9dEjPaZgB64icTfwW1uHaU8NvzEZ7A4EFG7aMgWTQMMOMd9BmYKANP38ckYzd5LDS2aUVB2oVhOIpSPPDCKNOwKgmiHs5uhWDMVNzha1k5Qtgq3QifVbWPsYrx0LpTpgvqtxd4087dw40uXDntLDpGr2BPV64zSv6y8lmRXK_6ye2.zQ2Xnb76NA3VAW_4amPA53uzw",mdrd: "2pOSBWGw9R.OB7BrsCcq0ZGrtq_j1dqFQoHz3OZZA8A-1739795843-1.2.1.1-rqwSLbqRVTUBabuLC8GwM_GrV9IIYHfObd_VEOS.9hNZMc7ne6q_VCgCZ0du9JDupGaFLDXasCvaPoMZESOGAJWsRQBVafGwpkVz35mRQAJvyzP3JTz3c1MFZk6DndCYgXICM499q0ZGHpsU.Zw5FVgzR9NRAs4wKvCLlfYu1Wj6acl.tcATwVKnr7V7QtfectnSLoubWcscokXCYNilfpQYdtBXEImCIooH2R2X.0z48Hfp3OSccOujW6fRwHy76dYUfDtXdl47thf0aI1M6HohWvfyRwKG8_r8VzfpGIrXsYRgl9jRpM5B9qcTdukMwesojdfP66b_a675fxcRLUE4nVi0KjMS_SJ6_4junCgliMbORngH6NYZT_.cMFjBmyiBxgk2QXB5Zz7ltnXGdH9DtJQvfZ8By7P1eC5be8J.l5dggwfhRZkqle.eTcPIoqnE3N7xZ4wrn77pnpzQ9gIiyeC0hK_t8jZqsOw2ZOnik53ObYYo2G6XUTXjsDExB8MBONcn0phzYW_.oy1o4uDW51SLvLzjTAwymtCwF8RC3JfObLjntpxUqy.SGLVYlAGraMgl7NL50LfFyGRrLbhgs4h5MFjzIBE.MFzPu.r7_dIYrdAfE2pe9wOw5i7HTft0iHp5feXOQfS0UyP6I_XLrISqKXn0dmYwPGKA1Mb7GMXfP4yAtss3a0XY85c1oV_uPKfj3_l7FdOW2I2M4s5QjgZ1S5tbL3b5FuQHUck1pj9OAhGlXlWM.HEgANWjDnAfITynkQSI1TuaJ3MGY_gZM_cWMhwGBU5v3ZPtrhMJUMDb9DlNFYe4jKNx6BOXVubfYHZYUjHo2UWSv5g_K8MhkatCOTt4kcCbeIRju_GgPMQyWdId5NXETlotlhvq47qat9oqlhup5UxQX_52BeLDCycyf1dwZ.2IiHelf884vqYID6ZzPDmduYHTDCHmvBRyCL2J9ywxLeVc2IXVq_kF2844yFZnazSYNweTwQYXB1nGz1PLK8eG8HEb8ycIt1gYPn4Yyrfgd0BGNp1eeiz2WhwUG13KEMBnky8ZeIw4SYQdohmU.S.pgXAjW6186Omu9D4PKAJWZM_9VEJRxecpd2TXgGsxLzrW5W.mokZ5fCdlc5w8NxUhAYfehaoqd7Ba20fXe.M0KWieDXdjPHjE6on7wPpJc4gPiqHDK6jz5DxeCrgwoDtmTeSy9YX6h5ehoKgZxE9lIVvAmnaMRESN5q67g2Ql015bI3zIZ49GWUKm8pnFaFXrZZ3891CBlPEt9SKA8ZyJYHRj_Oqgf2d_5yqaNxXKZfp.sTQxGt2IJioXCgLU2p4sEznwQzv.AAhxT93MnLXSrXhnV.FcroJi_ZxudSUN1arfMICUvdXCjisIjDh_Q8NMbUlDoZPYQ0Tw9gvcTw3_5nsamhjC7ZeKeKdqLJKuMlF4hVh4FeyEuYaFV8aiUciGjdv8LlGq1vLqYjwoVqZeRjk6H4ML0Bl4MrZXDPfBSMQPzX2QIfBgpsjitCDLY8dSZMtWHOQLMTdE4UVVDWtFsp47nn6QeD37taWzyt61iXf2TC3NzpGHKYxF4NN241pEQhhUJsqlV92ZTmxI8.nEejx5moQcypdluyfV0gsW7cSK.k.DK9pPbrKKCTcG33ZyfxMr2HrPmtoyp9u6q6wbvFswRXu8t6Id.HUzteJOa9tJ7SJVibMga3_2ZUBMmBx3SNRnnpdKVANHeAcj.1Hvnei0DhR111V6iyYRR8J1t3MUcOEsMqbOffVLJk69BkyjSZ2ixVdK5UGxPrGDWAJ1M8W_7X4LjpKiPQbJIZboJxiuDbckVUQ9Bu4h7WUahpkLicqS1wFGxfizCnRQOcWIgKN.MCvZQhWe091uPcBH65PbvgUFZJAT8Qf09ZP7oTZow6SKMzZn6fJ15wRDNepMzT2FhH1wssU6mBNJKGsRYHfeH_OwnPhBBLGKkHWfcGCkOLdnM4X6"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9135d4161fa2fe0b';window._cf_chl_opt.cOgUHash = location.hash === '' && location.href.indexOf('#') !== -1 ? '#' : location.hash;window._cf_chl_opt.cOgUQuery = location.search === '' && location.href.slice(0, location.href.length - window._cf_chl_opt.cOgUHash.length).indexOf('?') !== -1 ? '?' : location.search;if (window.history && window.history.replaceState) {var ogU = location.pathname + window._cf_chl_opt.cOgUQuery + window._cf_chl_opt.cOgUHash;history.replaceState(null, null, "\/abstracts\/search?q=vertical%20illuminance&page=39&__cf_chl_rt_tk=YwFhkIJ3GI7TL0K5B6gHRZXhD6iQELhrGi0ZnAG1FJA-1739795843-1.0.1.1-6I_ERQNw12L9Hzuf0E5eXORMoOyY9LHe1pZXLnTPnZo" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>