WASHINGTON - Consumers would collect on-the-spot rebates of $1,000 or more for buying insulation, water heaters or other equipment to make their homes burn energy more efficiently under a rebate program President Barack Obama is promoting. Obama was traveling to Savannah, Ga., on Tuesday to outline the Home Star program. Obama called for energy rebates in his State of the Union address, and officials hope the plan will be as popular as last year's Cash for Clunkers money-back program for autos. The new program has two levels of rebates. Various vendors, ranging from small, independent contractors to national home improvement chains, would promote the rebates, give the money to consumers and then wait for reimbursement from the federal government.