diff --git a/spawnentry.md b/spawnentry.md
index 0485162..27e1da0 100644
--- a/spawnentry.md
+++ b/spawnentry.md
@@ -9,10 +9,16 @@ The spawnentry table has an entry for every NPC that is possible for a spawngrou
 
 The condition_value_filter allows further filtering of which NPC gets picked.
 
-It is easy to get the roles of the _condition, cond_value (both from spawn2) and the condition_value_filter confused.  To summarize:
+It is easy to get the roles of the _condition, cond_value (both from spawn2) and condition_value_filter confused.  To summarize:
 
 **Field**|**Table**|**Notes**
 -----|-----|-----
-_condition|spawn2|A spawn2 entry will not file unless _condition is enabled (see spawn_condition_values).
-cond_value|spawn2|Nearly 100% of the usage of this field is on(1)/off(0).  0-off,1-on,2-n max _condition allowed to spawn.
-condition_value_filter|spawnentry|The cond_value of the _condition in the relevant spawn2 entry must match exactly to enable this npc
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+_condition|spawn2|A spawn2 entry will not fire unless _condition is zero (always on) or a specified non-zero _condition is enabled (see spawn_condition_values).
+cond_value|spawn2|Only used if (_condition > 0). Nearly 100% of the usage of this field is on(1)/off(0).
+condition_value_filter|spawnentry|The cond_value of the _condition in the relevant spawn2 entry must match exactly to enable this npc.
+
+**(Note about why condition_value_filter was added)**
+
+Most eqemu servers utilize (2) spawn2 entries to enable day/night.  One entry for Night (condition 1) and another for Day (condition 2).  Using this technique does not allow for day/night spawns to co-exist.  On live, some zones such as lake rathe, allow day mobs to spawn in spots where night mobs were killed, while leaving the rest of the night mobs up.
+
+The addition of the condition_value_filter in spawnentry allows day/night to be implemented using a single condition and single spawn2 locations for each mob.  These spawn2 entries are always enabled (cond_value 1).  The single condition simply toggles between day/night.  This is done by using a spawn_condition with an onchange value of 0 (do nothing).  The spawnentry rows are then filtered based on the current value of the _condition.  See [spawn_events](https://github.com/EQEmu/Server/wiki/spawn_events)table for details on how day/night are enabled/disabled.
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