diff --git a/init.lua b/init.lua
index 60c8489..cbe77e1 100644
--- a/init.lua
+++ b/init.lua
@@ -38,6 +38,8 @@ minetest.register_abm({
 })
 ]]
 
+-- 1h in minetest == 72s reale Zeit
+
 -- replacement LBM for pre-nodetimer plants
 minetest.register_lbm({
 	name = ":farming:start_nodetimer_",
@@ -50,9 +52,10 @@ minetest.register_lbm({
 minetest.register_abm({
 	nodenames="air",
 	intervall=1,
-	change=1000,
+	change=100000,
 	action = function(pos)
-		print(dump(farming.calc_light(pos,{light_min=15})))
+--		print(dump(farming.calc_light(pos,{light_min=15})))
+		print(os.clock(),minetest.get_timeofday())
 		end
 		})
 ]]
diff --git a/register.lua b/register.lua
index 0e48b25..b8c49a4 100644
--- a/register.lua
+++ b/register.lua
@@ -596,8 +596,18 @@ farming.step_on_timer = function(pos, elapsed)
 	end
 	-- new timer needed?
 	if def.next_step then
-		-- using light at midday to increase or decrease growing time
 		local wait_factor = math.max(0.75,def.light_min/minetest.get_node_light(pos,0.5))
+		-- check for config values
+		if meta:get_int("farming:lightamount") ~= nil then
+			if farming.light_stat[def.light_min] ~= nil then
+				local ls = farming.light_stat[def.light_min]
+				if ls.amount ~= nil and meta:get_int("farming:lightamount") > 0 then
+					-- time till next step is stretched. Less light means longer growing time
+					wait_factor = ls.amount / meta:get_int("farming:lightamount")
+				end
+			end
+		end
+		-- using light at midday to increase or decrease growing time
 		local wait_min = math.ceil(def.grow_time_min * wait_factor)
 		local wait_max = math.ceil(def.grow_time_max * wait_factor)
 		if wait_max <= wait_min then wait_max = 2*wait_min end