Save this as "Illuminated Windows.txt" in Bethesda Softworks\Morrowind\Mopy\Data\Removers
Spoiler "Light_MH_streetlamp_01"
"Green_SPulse_256"
"Light_MH_streetlamp_01_750"
"mm_windowlight_bright"
"mm_windowlight_small"
"mm_windowlight_dark_sm"
"mm_windowlight_red"
"mm_windowlight_brown"
"DA_windowlight_arrowslit"
"DA_windowlight_green"
"mm_windowlight_sm_red"
"mm_windowlight_mushb"
"mm_windowlight_mushg"
"mm_windowlight_vivi2"
"mm_windowlight_vivi3"
"mm_windowlight_mushl"
"mm_windowlight_molag1"
"mm_windowlight_molag2"
"mm_windowlight_lava"
"mm_windowlight_lav2"
"DA_windowlight_aldr3"
"mm_windowlight_aldr4"
"mm_windowlight_aldr6"
"mm_windowlight_aldr7" "Bug Lamp"
"mm_windowlight_orang2"
"mm_windowlight_brigh2"
"mm_windowlight_vivic5"
"DA_windowlight_orange"
"DA_light_de_lantern_03_77"
"DA_DLGlow5"
"DA_windowlight_blue"
"DA_windowlight_vivic6"
"DA_Glow6"
"DA_purpleINT_212"
"DA_windowlight_vivic_dome"
"DA_drk_blue_700"
"DA_windowlight_orange2"
"DA_windowlight_orange64"
"light_de_lantern2_07" "Paper Lantern"
"DA_red_128"
"light_de_streetlight2_01_128"
"DA_light_de_lantern_03_s_128"
"DA_Green light2_256"
"mm_windowlight_red_256"
"mm_windowlight256_blue"
"DA_Green_128_pulse"
"DA_light_de_lantern_06_80" "Glass Lantern"
"DA_Green_Dome_256_pulse"
"DA_purpleINT_256"
"DA_aqua_256"
"DA_light_de_lantern_08"
"DA_purpleINTpulse_256"
"DA_purpleINT_128"
"DA_MH_red_64"
"DA_light_de_streetlight_01_200"
"DA_light_de_lanternp_03_s_128"
"DA_purpleINT2_256"
"DA_light_de_streetlight_01_300"
"DA_light_de_lantern_08_128"
"DA_purpleyurt_pulse_128"
"DA_windowlight_lightgreen"
"DA_light_de_lantern_04_sway"
"DA_windowlight_mushg"
"DA_light_de_streetlight_01_128"
"DA_Green light3_256"
"DA_aqua2_256"
"DA_purpleINTflicker_212"
"DA_light_de_streetlight2_01_128"
"DA_purpleINTflicker_64"
"DA_light_de_voslantern_08_128"
"DA_light_de_lantern_04_77"
"DA_windowlight_mushb"
"DA_windowlight_orangedrk"
"DA_Greenpulse_128"
"DA_windowlight_blue2"
"DA_windowlight_pinkcamp"
"DA_light_de_lantern2_03_s_128"
"blue water ref 400_ripple"
"DA_windowlightSTRONG_orange"
"DA_strong_de_streetlight_01_300"
"DA_grn_Glow5"
"DA_sadith_de_lantern_08_100"
"DA_light_fire_eyes_small"
"DA_windowlight_orange128"
"DA_MHGreen_256"
"blue water2 ref_256"
"DA_light_de_lantern_08_400"
"DA_Greenpulse_64"
"DA_light_de_paper_lantern_01_64"
"DA_Green_128"
"DA_molag_red_512_01"
"DA_red_64"
"DA_red2_128"
"DA_aqua"
"DA_purpleNIGG_212"
"DA_Purp_yurt_light"
"DA_windowlight_teal"
"DA_red2_128_plse"
"DA_day_grn_Glow"
"DA_windowlight_orange100"
"DA_windowlight_blue256"
"DA_windowlightRand_orange"
"DA_windowlightRand_blue"
"DA_light2_de_streetlight_01_100"
"DA_RandGreenpulse_64"
"DA_Firepit_F_128"
"DA_windowlightRand_green"
"DA_RandGreenpulse_128"
"DA_windowlightRand_vivic6"
"DA_DLGlow6"
"DA_int_orange128"
"DA_Greenpulse_32"
"DA_candle_32" "Candle"
"DA_GreenpulseSTRONG_64"
"DA_windowlightRand_orange2"
#Bloodmoon Addon
"Green_SPulse_256"
"mm_windowlight_arrowslit"
"DA_windowlight_orange"
"DA_DLGlow5"
"1DA_drkblu_212"
"DA_windowlight_orange2"
"DA_windowlight_orange64"
"DA_light_de_lantern_06_80" "Glass Lantern"
"DA_light_de_streetlight_01_200"
"DA_Greenpulse_128"
"DA_light_de_lantern2_03_s_128"
"DA_grn_Glow5"
"DA_windowlightRand_orange"
"DA_BMwindowlight_orange"
"Furn_De_Firepit2_F_200"
"DA_light2_de_streetlight_01_128"
"DA_COLONY_windowlight2"
"DA_COLONY_windowlightSMITH"
"DA_COLONY_windowlight3"
"DA_COLONYE3F_windowlight"
"DA_COLONYE2F_windowlight"
"DA_COLONY35_windowlight4"
"DA_light_com_lantern_01_128" "Travel Lantern"
"1DA_lantern_01_128" "Travel Lantern"
"2DA_antern_01_77" "Travel Lantern"
"1DA_lantern2_128"
"1DA_com_lantern_128" "Travel Lantern"
"DA_COLONYE1Mine_windowlight"
"DA_COLONYTrader_windowlight"
"1DA_COLONYminelant_256" "Travel Lantern"
"DA_COLONYE1F_windowlight"
"1DA_COLONYE1Flant_256" "Travel Lantern"
"DA_purpleNIGG2_64"
"1DA_blue_128_01"
"1DA_COLONYE4Flant_256" "Travel Lantern"
"DA_INTwindowlight2"
"1DA_COLONYE2Flant_256" "Travel Lantern"
"1DA_COLONYE3Flant_256" "Travel Lantern"
"1DA_COLONYfirstboat_light" "Glass Lantern"
"1DA_COLONYminelant_100" "Travel Lantern"
"DA_Firepit"
"1DA_COLONYE2Flant_77" "Travel Lantern"
Then right click your save game, choose Remove > Edit Removers...
Click "Add"
Double click "Illuminated Windows.txt"
Close the dialog
Right click on save game again choose Remove > Illuminated Windows
Those are all the Illuminated Windows reference IDs, Mash will remove them from your save game.