What do you mean by sun like? Are you talking about UV or just white lights instead of blurps? Adding another light to your blurple will help simply because you're adding more light.
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They call them sunlike lights , idk . I know more light will increase everything . Mars recommends 3 , ts1000s for a 4x4 . I went with 4 of them . The blurple would be to get the other color receptors in the plants that sunlike lights don’t achieve . Which has been said to increase trichome production . I was basically looking for someone to verify this .