Red, what RickRyan is advocating is definitely worth it. However, you are the only one who can determine the expense of your initial cash outlay.
Two years ago, I purchased up-lighting that could be used as either dance floor lighting (similar to 4-Bar) or room up-lighting. At least they were making me some extra cash as an add-on for dances and parties. Then I got my first real up-lighting gig. Took the lights to the venue and set them up and discovered they were not bright enough for the room. Lesson learned: Buy the brightest or next brightest lights first. That gig was done for a minimal up-light charge because I wanted to get the gig and have pictures to show of the venue....so others would see and would be willing to part with extra cash. Throughout the past two years I have added more of the higher intensity lights to match those that I already had. Word to the wise...buy more lights when you do than you are planning to use. Why? Because they become obsolete so fast! Fortunately, the same supplier had an upgrade that was a tiny bit brighter that played well with the older ones that became "discontinued."
Now we are at another crossroads, too. Do we go battery-powered and wireless or continue with the non-battery units. That's a choice you will have to make. We've all seen the introduction of wireless and battery units; more suppliers are surely to come into the market place with variations...and down the road, those earlier models will be discontinued, too.
Back to the upselling of wall up-lights. At a recent meeting, light demo at the venue the Bride optioned for the additional light package that I had quoted previously. She and her fiance were not sure if the extra lights would be worth the money. Enter light consultation and demonstration. Her color was not a standard color. I set out about 6-8 lights with different variations of the color she had shown me. I also added lights to the other area that we had discussed and that she was not sure of spending the extra money. To make this story shorter, she was exstatic with the entire demo and authorized the additional lighting package to her existing up-lighting quote. Bottom Line--they have to see it to believe it. Photos will do the same, but not like when the Bride see's the colors in the room at the venue where she as booked the wedding. Which reminds me...I need to add in a Lighting Consultation and Demonstration Fee whenever room up-lighting is requested.
Hope my little story has helped you make an informed decision on which road to travel because you are definitely at a crossroad of sorts.
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Softjock Rick...you are correct. Not every venue has their own up-lighting, however.