Installed a new ceiling tonite in my sons bedroom. It is controlled by switch , 1 for fan & 1 for light. This bedroom is on its own circuit with adjoing bedroom (panel says bedroom 1-2 on this breaker). I wired black to black , white to white , red to blue , bare to green. Turned breaker back on and fan/light worked as it should. Well about an hour later went into master bedroom (it to is on its own circuit) and no lights. Went to panel and breaker was tripped . Flippd it back on and about 2 hours later it tripped again. So kinda puzzled as to why the master bedroom is tripping but not bedroom #1 where the fan was just installed. Its a newer home built in 09 , there was not a light or fan fixture installed previously in bedroom #1. The circuit breaker in panel is one that has a test button and three different postions (I think middle postion was ground fault) . I've just moved into home a few weeks ago and haven't had a problem with tripping breaker until tonite so any advice is appreciated. Thank you

1. Would an old three-bulb T12 troffer have had two ballasts, or what? 2. Would a two-bulb T8 retrofit kit use a single ballast for both bulbs? 3. What would a lighting contractor do if customer specified switching so just half of each fixture could be on if desired? Background ... The office hired an energy management contractor to save big money ... the contractor guarantees lower energy payments and more or less takes a commission. Here's the issue. The old 2x4 troffers had three T12 bulbs each. In most areas they were configured with the two outboard bulbs on one switch and the inboard bulb on another switch, so the occupants could select 1/3 lighting, 2/3 lighting or full brightness. Now they are replacing the reflectors and ballasts with retrofit kits that have two T8 bulbs. They are switching by [i]row[/i] rather than 1/2 of the fixture on one switch and 1/2 of the fixture on the other switch. So now for example if an area has three rows of troffers, they put the center row on one switch and the outside rows on another switch. This means a choice between some work stations having full brightness and others having no direct lighting, or all lights on, which is causing consternation as most people preferred 1/3 or 2/3.