ok so i am making a real life - looking office now, the thing is that i cannot work out how to make the lights turn on and off with a switch, can someone show me a tut or maybe tell me.

I believe that it will be somesort of func entity but i dont really know.

Also is there any better way to make sky other than making a huge block around your building? I thought maybe putting a block infront of your window and making a invisible wall infrom of that so there is no holes in the Hull?

I'm really getting into the mapping lark now, its kinda addictive

There are lots of ways to trigger events in a map.  One method is to use the trigger_xxx entities.

Most of these are point entities, but some are brush-based.  You can also use a multi_manager entity to trigger up to 16 groups of entities at once.

For example, if you wanted to trigger an event at the start of the level, use a trigger_auto with its target set to the entity name you want to fire.  If you want to trigger something when a player walks into a particular area, then cover that area with a brush and turn the brush into a trigger_once or trigger_multiple.

Another way to trigger events is to use a func_xxx entity.  The most commonly used is a func_button, which fires its targets when a player uses it (or, optionally, when he shoots it).

You can place a sky brush directly over a window opening instead of creating a big sky box.  The sky effect is rendered the same regardless of perspective.