Does LED Light Therapy for Your Face Darken Melasma?

I have a very severe case of melasma on both cheeks,my forehead and above my lip.I am very interested in purchasing a hand held led light device for at home use.are these lights effective? I would like to use the red light for aging,the blue for my stubborn acne and the green for my melasma.I have read 2 reviews from women who say it has darkened there melasma. I am curious about this. Do you think any of these lights will worsen my melasma and if not are these devices really effective. Thanks

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