某住户安装了分时电表，白天电价是0.55元，夜间电价是0.3元，计划7月份用电400 度，电费不超过160元，那么，白天用电不应该超过多少度？

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SQL Error: select id,body,options from ***_enewstiku where sourceid='25985' and id < 2181069 and id<>'2181069' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25985' and id > 2181069 and id<>'2181069' order by id asc limit 5