diff --git a/models.lua b/models.lua
index a30855f..3238672 100644
--- a/models.lua
+++ b/models.lua
@@ -39,7 +39,7 @@ end
 -- register some blocks in stairsplus if available (part of moreblocks)
 scifi_nodes.register_slope("white2", "Plastic", {"scifi_nodes_white2.png",}, 0)
 scifi_nodes.register_slope("super_white", "Super Plastic", {"scifi_nodes_super_white.png",}, 11)
-scifi_nodes.register_slope("ultra_white", "Super Plastic", {"scifi_nodes_ultra_white.png",}, default.LIGHT_MAX)
+scifi_nodes.register_slope("ultra_white", "Super Plastic", {"scifi_nodes_ultra_white.png",}, minetest.LIGHT_MAX)
 scifi_nodes.register_slope("black", "Black", {"scifi_nodes_black.png",}, 0)
 scifi_nodes.register_slope("white", "White", {"scifi_nodes_white.png",}, 0)
 scifi_nodes.register_slope("grey", "Grey", {"scifi_nodes_grey.png",}, 0)
@@ -54,8 +54,8 @@ scifi_nodes.register_slope("holes", "Holes", {"scifi_nodes_holes.png",}, 0)
 scifi_nodes.register_slope("pipe", "Pipe", {"scifi_nodes_pipe.png",}, 0)
 scifi_nodes.register_slope("stripes", "Stripes", {"scifi_nodes_stripes.png",}, 0)
 scifi_nodes.register_slope("screen", "Screen", {"scifi_nodes_screen3.png",}, 5)
-scifi_nodes.register_slope("lightstripe", "Lightstripe", {"scifi_nodes_lightstripe.png",}, default.LIGHT_MAX)
-scifi_nodes.register_slope("blight2", "Blue Light 2", {"scifi_nodes_capsule3.png",}, default.LIGHT_MAX)
+scifi_nodes.register_slope("lightstripe", "Lightstripe", {"scifi_nodes_lightstripe.png",}, minetest.LIGHT_MAX)
+scifi_nodes.register_slope("blight2", "Blue Light 2", {"scifi_nodes_capsule3.png",}, minetest.LIGHT_MAX)
 scifi_nodes.register_slope("wallpipe", "Alien Pipe", {"scifi_nodes_wallpipe.png",}, 0)
 scifi_nodes.register_slope("alien", "Alien Wall", {"scifi_nodes_alnslp.png",}, 0)
 scifi_nodes.register_slope("purple", "Purple", {"scifi_nodes_purple.png",}, 0)
@@ -74,7 +74,7 @@ node.types = {
 	{"holes",       "metal with holes"},
 	{"white2",      "plastic",},
 	{"super_white",      "Super Plastic", 11},
-	{"ultra_white",      "Ultra Plastic", default.LIGHT_MAX},
+	{"ultra_white",      "Ultra Plastic", minetest.LIGHT_MAX},
 --	{"engine",      "engine",          "engine"},
 	{"wall",      "metal wall"},
 	{"white",      "plastic wall"},
@@ -139,10 +139,10 @@ node.types = {
 --	{"monitorwall",      "Wall monitors",       "monitorwall"},
 	{"screen3",      "Wall monitor"},
 	{"doomlight",      "Doom light",       12},
-	{"bluwllight",      "Blue wall light", default.LIGHT_MAX},
+	{"bluwllight",      "Blue wall light", minetest.LIGHT_MAX},
 	{"bluegrid",      "Blue Grid", 5},
 	{"fan",      "Fan"},
-	{"ppllght",      "Purple wall light", default.LIGHT_MAX},
+	{"ppllght",      "Purple wall light", minetest.LIGHT_MAX},
 	{"pplwll",      "Purple wall"},
 	{"pplwll2",      "Purple wall2"},
 	{"pplwll3",      "Purple wall3"},
diff --git a/nodeboxes.lua b/nodeboxes.lua
index 6c9fef2..828ff16 100644
--- a/nodeboxes.lua
+++ b/nodeboxes.lua
@@ -304,7 +304,7 @@ minetest.register_node("scifi_nodes:gloshroom", {
 	},
 	drawtype = "nodebox",
 	paramtype = "light",
-	light_source = default.LIGHT_MAX,
+	light_source = minetest.LIGHT_MAX,
 	walkable = false,
 	buildable_to = true,
 	sunlight_propagates = false,
@@ -451,7 +451,7 @@ minetest.register_node("scifi_nodes:lightbar", {
 	paramtype = "light",
 	paramtype2 = "wallmounted",
 	sunlight_propagates = true,
-	light_source = default.LIGHT_MAX,
+	light_source = minetest.LIGHT_MAX,
 	node_box = {
 		type = "fixed",
 		fixed = {
@@ -488,7 +488,7 @@ minetest.register_node("scifi_nodes:light_dynamic", {
 		}
 	},
 	paramtype2 = "wallmounted",
-	light_source = default.LIGHT_MAX,
+	light_source = minetest.LIGHT_MAX,
 	groups = {cracky=1, oddly_breakable_by_hand=1},
 	sounds = default.node_sound_glass_defaults()
 })
@@ -536,7 +536,7 @@ minetest.register_node("scifi_nodes:lightbars", {
 	drawtype = "nodebox",
 	paramtype = "light",
 	use_texture_alpha = "blend",
-	light_source = default.LIGHT_MAX,
+	light_source = minetest.LIGHT_MAX,
 	node_box = {
 		type = "fixed",
 		fixed = {
@@ -557,7 +557,7 @@ tiles = {{
 		animation = {type = "vertical_frames", aspect_w = 16, aspect_h = 16, length = 1.00},
 	}},
 	use_texture_alpha = "blend",
-	light_source = default.LIGHT_MAX,
+	light_source = minetest.LIGHT_MAX,
 	drawtype = "nodebox",
 	sunlight_propagates = true,
 	paramtype = "light",
@@ -577,7 +577,7 @@ tiles = {
 		"scifi_nodes_orange.png",
 	},
 	use_texture_alpha = "blend",
-	light_source = default.LIGHT_MAX,
+	light_source = minetest.LIGHT_MAX,
 	drawtype = "nodebox",
 	sunlight_propagates = true,
 	paramtype = "light",
@@ -1128,7 +1128,7 @@ minetest.register_node("scifi_nodes:glassscreen", {
 	drawtype = "nodebox",
 	paramtype = "light",
 	paramtype2 = "facedir",
-	light_source = default.LIGHT_MAX,
+	light_source = minetest.LIGHT_MAX,
 	sunlight_propagates = true,
 	node_box = {
 		type = "fixed",
diff --git a/nodes.lua b/nodes.lua
index 6643d6d..032c5d7 100644
--- a/nodes.lua
+++ b/nodes.lua
@@ -454,7 +454,7 @@ minetest.register_node("scifi_nodes:lightstp", {
 	tiles = {
 		"scifi_nodes_lightstripe.png"
 	},
-	light_source = default.LIGHT_MAX,
+	light_source = minetest.LIGHT_MAX,
 	paramtype = "light",
 	groups = {cracky=1},
 	sounds = default.node_sound_glass_defaults()
@@ -522,7 +522,7 @@ local nodetypes = {
 	{"holes",       "metal with holes","holes"},
 	{"white2",      "plastic",         "white2", 0, true},
     {"super_white",      "Super Plastic",         "super_white", 11},
-    {"ultra_white",      "Ultra Plastic",         "ultra_white", default.LIGHT_MAX},
+    {"ultra_white",      "Ultra Plastic",         "ultra_white", minetest.LIGHT_MAX},
 	{"engine",      "engine",          "engine"},
 	{"wall",      "metal wall",        "wall"},
 	{"white",      "plastic wall",     "white", 0, true},
@@ -587,10 +587,10 @@ local nodetypes = {
 	{"monitorwall",      "Wall monitors",       "monitorwall"},
 	{"screen3",      "Wall monitor",       "screen3"},
 	{"doomlight",      "Doom light",       "doomlight", 12},
-	{"bluwllight",      "Blue wall light", "capsule3", default.LIGHT_MAX},
+	{"bluwllight",      "Blue wall light", "capsule3", minetest.LIGHT_MAX},
 	{"bluegrid",      "Blue Grid", "bluegrid", 5},
 	{"fan",      "Fan",       "fan"},
-	{"ppllght",      "Purple wall light", "", default.LIGHT_MAX},
+	{"ppllght",      "Purple wall light", "", minetest.LIGHT_MAX},
 	{"pplwll",      "Purple wall", "", 0},
 	{"pplwll2",      "Purple wall2", "", 0},
 	{"pplwll3",      "Purple wall3", "", 0},
diff --git a/plants.lua b/plants.lua
index 1160a5e..3cc2c39 100644
--- a/plants.lua
+++ b/plants.lua
@@ -1,11 +1,11 @@
 
 local plants = {
-	{"flower1", "Glow Flower", 1,0, default.LIGHT_MAX},
+	{"flower1", "Glow Flower", 1,0, minetest.LIGHT_MAX},
 	{"flower2", "Pink Flower", 1.5,0, 10},
 	{"flower3", "Triffid", 2,5, 0},
 	{"flower4", "Weeping flower", 1.5,0, 0},
 	{"plant1", "Bulb Plant", 1,0, 0},
-	{"plant2", "Trap Plant", 1.5,0, default.LIGHT_MAX},
+	{"plant2", "Trap Plant", 1.5,0, minetest.LIGHT_MAX},
 	{"plant3", "Blue Jelly Plant", 1.2,0, 10},
 	{"plant4", "Green Jelly Plant", 1.2,0, 10},
 	{"plant5", "Fern Plant", 1.7,0, 0},