Tomato acting weird

I have 2 tomatos. The bigger 1 (I will assume it is a she) keeps chasing the male around all day. It has gotten to the point that he sleeps behind the collector box cuz she cant fit behind it. I have only noticed this happening when I have the Actinic(don't know if I spelled that correctly) lights on. Can the blue color be irritating her and she is taking it out on him? Enquiring minds want to know.
 
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