diff --git a/0140650.pd2 b/0140650.pd2
index a117842..b9bfcde 100644
Binary files a/0140650.pd2 and b/0140650.pd2 differ
diff --git a/lpc_modbus_lux.lua b/lpc_modbus_lux.lua
index 5eb4da6..a20a64c 100644
--- a/lpc_modbus_lux.lua
+++ b/lpc_modbus_lux.lua
@@ -29,6 +29,7 @@ local DEADBAND = lux_deadband
 local MIN_LEVEL = 0.05
 local MAX_LEVEL = 1.0
 local STEP_MAX = 0.20
+local K_DEFAULT = 3000
 
 local ok, grp = pcall(get_group, 0)
 if not ok or grp == nil then
@@ -38,16 +39,20 @@ if not ok or grp == nil then return end
 
 local err = TARGET_LUX - lux
 
-if lux_prev_cmd ~= nil and lux_prev_cur ~= nil and lux_prev_lux ~= nil then
+if lux_prev_cmd ~= nil and lux_prev_cur ~= nil and lux_prev_lux ~= nil and lux_prev_band ~= nil then
     local dl = lux_prev_cmd - lux_prev_cur
     local clamped = (lux_prev_cmd <= MIN_LEVEL + 0.001) or (lux_prev_cmd >= MAX_LEVEL - 0.001)
-    if math.abs(dl) > 0.002 and not clamped then
+    if math.abs(dl) > 0.005 and not clamped then
         local ki = (lux - lux_prev_lux) / dl
-        if ki > 100 and ki < 10000 then
-            if lux_k == nil then
-                lux_k = ki
+        if ki > 100 and ki < 10000 and math.abs(lux - lux_prev_lux) >= 3 then
+            lux_kb = lux_kb or {}
+            local kb = lux_kb[lux_prev_band]
+            if kb == nil then
+                lux_kb[lux_prev_band] = ki
+            elseif ki > kb then
+                lux_kb[lux_prev_band] = 0.5 * kb + 0.5 * ki
             else
-                lux_k = 0.7 * lux_k + 0.3 * ki
+                lux_kb[lux_prev_band] = 0.9 * kb + 0.1 * ki
             end
         end
     end
@@ -69,9 +74,20 @@ if cur == nil or (hw ~= nil and math.abs(hw - cur) > 0.05) then
     cur = hw or 0.5
 end
 
-local k = lux_k or 500
-local delta = err / k
+local band = math.floor(cur * 4.999) + 1
+local k = (lux_kb ~= nil and lux_kb[band]) or K_DEFAULT
+lux_agg = lux_agg or 0.7
+local delta
 if lux_last_err ~= nil and (err > 0) ~= (lux_last_err > 0) then
+    lux_agg = lux_agg * 0.5
+    if math.abs(err) > 3 and lux_kb ~= nil and lux_prev_band ~= nil and lux_kb[lux_prev_band] ~= nil then
+        lux_kb[lux_prev_band] = math.min(lux_kb[lux_prev_band] * 1.3, 10000)
+    end
+else
+    lux_agg = math.min(lux_agg * 1.15, 0.9)
+end
+delta = err / k * lux_agg
+if math.abs(err) < 30 then
     delta = delta * 0.5
 end
 lux_last_err = err
@@ -85,5 +101,6 @@ if new > MAX_LEVEL then new = MAX_LEVEL end
 lux_prev_cur = cur
 lux_prev_cmd = new
 lux_prev_lux = lux
+lux_prev_band = band
 lux_cur_level = new
 grp:set_master_intensity(new, lux_fade)