Power cost decrease on Lights and Shield Diffusers

code/modules/power/lighting.dm

@@ -161,7 +161,7 @@
 	layer = ABOVE_MOB_LAYER
 	use_power = 2
 	idle_power_usage = 2
-	active_power_usage = 20
+	active_power_usage = 10		// Previously 20.
 	power_channel = LIGHT //Lights are calc'd via area so they dont need to be in the machine list
 	var/on = 0					// 1 if on, 0 if off
 	var/brightness_range = 6	// luminosity when on, also used in power calculation

code/modules/shieldgen/shield_diffuser.dm

@@ -5,8 +5,8 @@
 	icon = 'icons/obj/machines/shielding.dmi'
 	icon_state = "fdiffuser_on"
 	use_power = 2
-	idle_power_usage = 100
-	active_power_usage = 2000
+	idle_power_usage = 25		// Previously 100.
+	active_power_usage = 500	// Previously 2000
 	anchored = 1
 	density = 0
 	level = 1