diff --git a/init.lua b/init.lua
index 54359bb..88314a4 100644
--- a/init.lua
+++ b/init.lua
@@ -155,6 +155,7 @@ else
 	dofile(MP.."/logic/detector.lua")
 	dofile(MP.."/logic/repeater.lua")
 	dofile(MP.."/logic/programmer.lua")
+	dofile(MP.."/logic/signallamp.lua")
 
 	-- Test
 	dofile(MP.."/recipe_checker.lua")
diff --git a/logic/programmer.lua b/logic/programmer.lua
index 657c140..0ce27fa 100644
--- a/logic/programmer.lua
+++ b/logic/programmer.lua
@@ -94,8 +94,8 @@ minetest.register_craft({
 	output = "techage:programmer",
 	recipe = {
 		{"", "default:steel_ingot", ""},
-		{"", "techage:wlanchip",    ""},
-		{"", "dye:red",             ""},
+		{"", "techage:ta4_wlanchip", ""},
+		{"", "dye:red", ""},
 	},
 })
 
diff --git a/logic/signallamp.lua b/logic/signallamp.lua
new file mode 100644
index 0000000..2dbc9e5
--- /dev/null
+++ b/logic/signallamp.lua
@@ -0,0 +1,133 @@
+--[[
+
+	TechAge
+	=======
+
+	Copyright (C) 2019 Joachim Stolberg
+
+	GPL v3
+	See LICENSE.txt for more information
+
+	Colored Signal Lamp (requires unifieddyes)
+	
+]]--
+
+-- for lazy programmers
+local M = minetest.get_meta
+local S = techage.S
+
+local logic = techage.logic
+
+local COLORED = minetest.get_modpath("unifieddyes") and unifieddyes
+
+
+local function switch_on(pos, node)
+	node.name = "techage:signal_lamp_on"
+	minetest.swap_node(pos, node)
+end	
+
+local function switch_off(pos, node)
+	node.name = "techage:signal_lamp_off"
+	minetest.swap_node(pos, node)
+end	
+
+minetest.register_node("techage:signal_lamp_off", {
+	description = S("Techage Signal Lamp (can be colored)"),
+	tiles = {"techage_signal_lamp.png^[colorize:#000000:100"},
+	drawtype = "nodebox",
+    node_box = {
+		type = "fixed",
+		fixed = {
+			{-6/16, -6/16, -6/16,  6/16, 6/16, 6/16},
+			{-4/16, -10/16, -4/16,  4/16, -6/16, 4/16},
+		},
+	},
+
+	after_place_node = function(pos, placer, itemstack, pointed_thing)
+		logic.after_place_node(pos, placer, "techage:signal_lamp_off", S("Techage Signal Lamp"))
+		logic.infotext(M(pos), S("Techage Signal Lamp"))
+		if COLORED then
+			unifieddyes.recolor_on_place(pos, placer, itemstack, pointed_thing)
+		end
+	end,
+
+	on_rightclick = switch_on,
+
+	after_dig_node = function(pos, oldnode, oldmetadata, digger)
+		techage.remove_node(pos)
+		if COLORED then
+			unifieddyes.after_dig_node(pos, oldnode, oldmetadata, digger)
+		end
+	end,
+
+	on_construct = COLORED and unifieddyes.on_construct,
+	on_dig = COLORED and unifieddyes.on_dig,
+	
+	paramtype = "light",
+	paramtype2 = "color",
+	palette = "unifieddyes_palette_extended.png",
+	place_param2 = 241,
+	sunlight_propagates = true,
+	sounds = default.node_sound_stone_defaults(),
+	groups = {choppy=2, cracky=1, ud_param2_colorable = 1},
+	is_ground_content = false,
+	drop = "techage:signal_lamp_off"
+})
+
+
+minetest.register_node("techage:signal_lamp_on", {
+	description = S("Techage Signal Lamp"),
+	tiles = {"techage_signal_lamp.png"},
+	drawtype = "nodebox",
+    node_box = {
+		type = "fixed",
+		fixed = {
+			{-6/16, -6/16, -6/16,  6/16, 6/16, 6/16},
+			{-4/16, -10/16, -4/16,  4/16, -6/16, 4/16},
+		},
+	},
+	on_rightclick = switch_off,
+
+	paramtype = "light",
+	paramtype2 = "color",
+	palette = "unifieddyes_palette_extended.png",
+	groups = {choppy=2, cracky=1, not_in_creative_inventory=1, ud_param2_colorable = 1},
+	
+	on_construct = COLORED and unifieddyes.on_construct,
+	after_place_node = COLORED and unifieddyes.recolor_on_place,
+	
+	after_dig_node = function(pos, oldnode, oldmetadata, digger)
+		techage.remove_node(pos)
+		if COLORED then
+			unifieddyes.after_dig_node(pos, oldnode, oldmetadata, digger)
+		end
+	end,
+   
+	on_dig = COLORED and unifieddyes.on_dig,
+	light_source = 10,	
+	is_ground_content = false,
+	drop = "techage:signal_lamp_off"
+})
+
+techage.register_node({"techage:signal_lamp_off", "techage:signal_lamp_on"}, {
+	on_recv_message = function(pos, topic, payload)
+		print("on_recv_message", topic)
+		if topic == "on" then
+			local node = minetest.get_node(pos)
+			switch_on(pos, node)
+		elseif topic == "off" then
+			local node = minetest.get_node(pos)
+			switch_off(pos, node)
+		end
+	end,
+})	
+
+minetest.register_craft({
+	output = "techage:signal_lamp_off",
+	recipe = {
+		{"", "wool:white", ""},
+		{"", "default:torch", ""},
+		{"", "techage:vacuum_tube", ""},
+	},
+})
+
diff --git a/textures/techage_signal_lamp.png b/textures/techage_signal_lamp.png
new file mode 100644
index 0000000..51ec174
Binary files /dev/null and b/textures/techage_signal_lamp.png differ