snow becomes a lightsource

mods/default/nodes.lua

@@ -386,6 +386,7 @@ minetest.register_node("default:dirt_with_snow", {
 			tileable_vertical = false}},
 	groups = {crumbly = 3, soil = 1},
 	drop = 'default:dirt',
+	light_source = 1,
 	sounds = default.node_sound_dirt_defaults({
 		footstep = {name = "default_snow_footstep", gain = 0.15},
 	}),
@@ -439,6 +440,7 @@ minetest.register_node("default:snow", {
 	floodable = true,
 	walkable = false,
 	drawtype = "nodebox",
+	light_source = 2,
 	node_box = {
 		type = "fixed",
 		fixed = {
@@ -464,6 +466,7 @@ minetest.register_node("default:snowblock", {
 	description = "Snow Block",
 	tiles = {"default_snow.png"},
 	groups = {crumbly = 3, puts_out_fire = 1},
+	light_source = 2,
 	sounds = default.node_sound_dirt_defaults({
 		footstep = {name = "default_snow_footstep", gain = 0.15},
 		dug = {name = "default_snow_footstep", gain = 0.2},