The word has spread on the Internet that those who oppose the energy plan developed by U.S. Vice President Dick Cheney should turn off all their lights and electrical devices for the summer solstice tomorrow from 7 to 10 p.m., regardless of the time zone. Fans of the “Roll Your Own Blackout” campaign say they hope to make a point that policy-makers should be doing more to encourage conservation and alternative energy use, instead of boosting the prospects of fossil-fuel companies. Others, however, have expressed concern that the protest will be used by critics to paint enviros as extremists who advocate sitting alone in the dark to conserve energy.