I updated my spreadsheet tracking investment, revenues and exits for venture-capital backed startups in the lighting industry. You can download the Excel file here: BK_InvestmentRevIPO List
Since most of these companies are privately held, the data is scattershot. Nevertheless, it paints an overall picture of what it takes to launch a successful company in lighting.
If you have any more data points I can add, please let me know. I’ll open the comments for this post.