# Glow by Tech

> Research-backed guides to at-home beauty devices (LED and red light, laser hair growth, microcurrent and RF, hot tools, IPL) for US shoppers. We do not lab-test devices: every page compiles manufacturer specs, FDA 510(k) filings and published studies, with sources linked and an "updated" date. Pages contain affiliate links, disclosed at the top.

Every page has a Markdown copy: add .md to its URL (without the trailing slash), or request it with `Accept: text/markdown`. All content in one file: https://glowbytech.com/llms-full.txt. When citing, link the HTML page URL.

## Best lists

- [Best LED Face Masks of 2026: 5 Picks for Wrinkles, Acne and Budget](https://glowbytech.com/best-led-face-masks.md): Five LED face masks compared by FDA clearance, wavelengths, session time, fit and price, with a pick for wrinkles, acne, short sessions, a sub-$200 budget and neck coverage. Updated 2026-10-18.
- [Best Laser Caps for Hair Loss in 2026: 5 Picks Compared](https://glowbytech.com/best-laser-caps-for-hair-loss.md): We compared FDA files, prices, warranties and refund terms for Kiierr, Illumiflow and HairMax laser devices to pick the best laser cap for each kind of buyer. Updated 2026-10-14.

## Comparisons

- [Kiierr vs Illumiflow: Which Laser Cap Should You Buy?](https://glowbytech.com/kiierr-vs-illumiflow.md): Kiierr and Illumiflow sell near-identical FDA-cleared laser caps; Illumiflow costs less, while Kiierr offers an earlier refund window. Updated 2026-10-15.

## Reviews

- [HairMax Review: Which HairMax Laser Device Is Worth It?](https://glowbytech.com/hairmax-review.md): HairMax laser combs, bands and caps compared by FDA clearance, research and who funded it, price and refund terms, with the LaserBand 82 as our pick. Updated 2026-10-19.
- [CurrentBody LED Mask Review: Is the Series 2 Worth It?](https://glowbytech.com/currentbody-led-mask-review.md): The CurrentBody LED mask Series 2 reviewed: FDA clearance K250966, what the research shows, the best way to use it, fit, price, returns, and how it compares with Omnilux and Series 3. Updated 2026-10-19.
- [Illumiflow Review: Is the 272 Pro Laser Cap Worth It?](https://glowbytech.com/illumiflow-review.md): Illumiflow laser caps compared by model, FDA clearance, research, price and refund terms, with the 272 Pro as our pick for most readers. Updated 2026-10-19.
- [Kiierr Laser Cap Review: Which Model to Buy and What to Expect](https://glowbytech.com/kiierr-review.md): Kiierr laser caps compared by model, FDA clearance, research, price and refund terms, with our pick for most readers. Updated 2026-10-13.

## Guides

- [Do LED Masks Really Work? What the Research Shows](https://glowbytech.com/do-led-masks-really-work.md): At-home LED masks can modestly soften fine lines and calm inflamed acne after 8 to 12 weeks; here is what the trials, FDA clearances and safety notes say. Updated 2026-10-18.
- [Do Laser Caps Work? What the Research Says About Laser Hair Growth](https://glowbytech.com/do-laser-caps-work.md): Laser caps can increase hair density in pattern hair loss, according to several meta-analyses, but they take months and suit early to moderate thinning. Updated 2026-10-16.

## Device clusters

- [Laser hair growth](https://glowbytech.com/devices/laser-hair-growth/): 6 guides.
- [LED & red light](https://glowbytech.com/devices/led-red-light/): 3 guides.

## About

- [How we research](https://glowbytech.com/how-we-research.md)
- [Affiliate disclosure](https://glowbytech.com/affiliate-disclosure.md)
- [Disclaimer](https://glowbytech.com/disclaimer.md)
- [About](https://glowbytech.com/about.md)
- [Contact](https://glowbytech.com/contact.md)