How Effective is Photomodulation (LED Skin Treatment) for Skin Tightening?

Thank you for your question. I would suggest Ultherapy for facial skin tightening, not Photomodulation. Ultherapy deposits focused ultrasound energy below the surface of the skin to stimulate the body’s creation of new collagen. As a result, skin will actually begin to lift and tone over time. Collagen is a natural protein that gives skin its youthfulness by keeping it firmed, toned and elastic. Plus, the treatment is completely non-invasive and does not require downtime. I have seen excellent results with the treatment.

LED treatments are an excellent way to stimulate the skin to refresh itself by "super-charging" the cells and speeding up repair mechanisms. Because it is a minimally invasive procedure, a series of treatments is ordinarily required to get any visible results. Certain LED lights and settings are excellent for enhancing the penetration and effect of anti-oxidant topical medications. as far as skin tightening is concerned, I doubt that LED is going to give you enough change in the health and fitness of your skin to see real skin tightening.
Currently, there are only 2 primary non-surgical means of skin tighenting: Thermage (results are very variable and usually mild) and laser resurfacing. Fractional laser such as Fraxel can give very mild tightening and full classical CO2 laser can give very good facial skin tightening but requires a long healing and recovery phase.
if skin tightening is your primary goal (because you have laxity in cheeks neck or jowls) your best results are likely to lie with a surgical approach: facelift or neck lift, even a minilift if your laxity is mild.
unfortunately, despite the proliferation of non-surgical treatment, non of them measure up to surgery for skin tightening.
if i were you i would get a consultation with a good plastic surgeon who can examine you and outline your options. if you want to stick to nonsurgical options, see if thermage is an option and if skin texture issues are also a concern add Fraxel laser resurfacing. if those options are too mild for your situation, consider surgery.