I have yet to find any folks I have bid who think a charge for that service is fair. I also rarely win bids from architects, who I have found are almost universally focused on what the fixture looks like.
I have also met with tons of folks who ask for a bid, you explain what you would do without a formal drawn design, and they just have someone else mimic your design.
I rarely win bid competitions.
Our jobs come from folks who want the best effects on their home and are willing to pay for it.