I don't think there is really a stand pat answer to your question. It's really what looks good given the space and obstructions you need to deal with. And the props you plan on putting in your yard.
That being said - our yards are roughly the same size - I was going to use 1 blue and 1 green in front - and 1 read and 1 yellow in back and maybe a small lantern.
So you probably have more then enough. You can't tell unless to do a trial run. What you have sounds good though.
That being said - our yards are roughly the same size - I was going to use 1 blue and 1 green in front - and 1 read and 1 yellow in back and maybe a small lantern.
So you probably have more then enough. You can't tell unless to do a trial run. What you have sounds good though.