text:  I didn't even know I was part of the test group, so I had no wherewithal to adjust my energy usage. That's Waialua resident Colin Steinberger. He's one of about 16,000 HECO customers on Hawaii Island and O'ahu who were randomly enrolled in its time-of-use pilot program six months ago. If I'm not expecting an email from a Hawaiian electric company with my bill, for example, then I'm not keeping an eye out for an email from Hawaiian electric companies.