Only Received Three Bulbs. Box contained white, dusty powder.

I just opened this product and there are only three light bulbs -- not four. And there is a white dust in the pocket where the fourth light bulb should be. Did it break and someone just removed it? Am I being exposed to broken florescent remains? This was shipped with other Amazon items in an undamaged box. The bulb had to have been removed before shipping. This may be a quality control issue.

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