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.