I have melasma on my upper cheeks/under eye area, will the omnilux LED machine aggravate this?

Thank you for your question, Melasma needs a combination approach to get the best improvement and will need a series of treatments. In our practice, we combine Clear + Brilliant, peels, microneedling/PRP, Aerolase, and sometimes Erbium (Cool Laser) to get the best results. See an expert for a formal evaluation. Best, Dr. Emer

I would recommend the Melarase Brightening Kit with Melarase AM, Melarase PM, Melapads, and Replenish to help with the melasma. Lasers and IPL are not good choices for untreated melasma. Best, Dr. KaramanoukianLos Angeles

OmniLux does not aggrevate melasmaMelasma needs long term commitment with skin care and avoidance of skin factors such as sun exposure (Spectrase Sun Block) which has wide UV spectrum and SPF 30+ protection. Accutane sensitizes your skin to injury from sun rays. 
Daily good habits with topicals may well help you chieve your goals with a good skin system ike the Brightening Kit from KareSkin (see link). You may want to start with Melarase and Pigmentation Correction Complex. Scler-X from another vendor is for PIH relief (see link). 
Clear + Brilliant laser can be added once you start your pretreatment with topicals. An Erbium type laser is good for large pore relief. Best

Since Omnilux treatments are with LED and not laser, it will not aggravate your melasma.

As a professional physician, however, I should inform you that LED treatments are not the first choice by an experienced doctor to treat fine lines & wrinkles. You should also know that it requires multiple treatments. Talk to your doctor about that and see what other optimal options may be available to treat fine lines and wrinkles.

No, the wavelength does not stimulate pigmentation, however, as suggested by Dr Melamed, Omnilux will do very little for lines and wrinkles. I do use Omnilux, only to treat acne or as a light to activate porphyrins - PDT. All the best, Dr Davin Lim. Brisbane. Australia.