I've just completed a new canopy and I've installed a pair of 40W NO actinics. They're drivin' me nuts ! Will they fire, or won't they. Wiggle this bulb, massage that bulb...oh, there they go.
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I recall a similar thread about actinics a while back. I don't know if it was here though...
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I've had similar problems in the past on other units too. It seems once the bulbs have burned for a while they're ok. I used a "Sylvania" ballast, tar. I've put in some "household" bulbs and they fired immediately so I think I'm safe ruling out a poor connection.
Any new developments on "stubborn" actinics...?