Single, Dual, and Quad Chip LEDs: Why the Diode Design Matters
Single-chip designs (RLT Home, PlatinumLED, Hooga HG line, Helio Cure) favor depth and spectral purity. Dual-chip (Mito, BlockBlueLight, Rouge, Bestqool, BON CHARGE) and quad-chip (Hooga ULTRA line) designs produce even surface distribution suited to skin-level work, at the cost of per-wavelength power. One counterpoint from the physiology: mitochondrial activation spreads to neighboring tissue, which weakens the practical value of perfectly even surface coverage. Neither architecture is a scam; they are different engineering bets, and the database records which each model uses.
What the database records
Chip architecture is recorded for every model where the brand states it. Across the 188 panels in the database it breaks down like this:
| Architecture | Models | Brands |
|---|---|---|
| Single-chip | 23 | Helio Cure, Hooga, PlatinumLED, RLT Home, Scienlodic |
| Dual-chip | 71 | Bestqool, BioLight, BlockBlueLight, Hooga, Infraredi, Kala Therapy, Leredd, LifePro, LightpathLED, LuminousRed, MITO LIGHT (EU), Mito Red Light, Orion, RedLife, Rojo Light Therapy, Rouge Care, TheThermoLab |
| Quad-chip | 5 | Hooga, Kala Therapy |
| Not published | 89 | 28 brands |
"Not published" is the largest group: those brands state an LED count and often a wattage, but not how many chips sit under each lens. The field shows on every panel database entry as "LED type", and the brand comparisons put it side by side.
Reading the LED line on a spec sheet
A spec sheet line such as "120 x 5W" gives the diode count and each diode's electrical rating. It does not give the light reaching your skin: the rating is the power the diode is built to take, not the power it emits, and a dual-chip diode splits whatever it emits across two wavelengths. Two panels with the same count and wattage can therefore deliver different irradiance at the same distance. The comparable number is irradiance measured with a stated instrument at a stated distance, which is why the spectrometer vs solar meter page and the claimed vs measured table carry more weight in the rankings than the LED line.
How to use this when choosing
If per-wavelength strength matters for your use, for example a deep-tissue goal that leans on 810 to 850nm, prefer a panel that publishes its per-wavelength density, whatever its chip design; the wavelength guide explains the bands. If even coverage across a large area is the goal, a dual- or quad-chip panel with many diodes does that job by design. In both cases the dose calculator converts the panel's spectrometer irradiance into session minutes, and chip design drops out of the arithmetic once you have a measured figure.
Driver current sets a panel's total optical power, but it does not say anything about how steady that current stays moment to moment. Our explainer on flicker covers percent flicker and flicker index, the separate spec that describes whether a driver delivers that current smoothly or lets it ripple at twice the mains frequency.
Chip count and architecture are an LED-specific concern; a panel's diodes are not the same light source as the lasers used in much of the older photobiomodulation trial literature. Our LED vs laser comparison covers why that swap has not been shown to change tissue outcomes, and what does differ between the two in practice.
Methodology: rankings weigh measured or method-stated irradiance, wavelength coverage and published density, buyer terms (trial, restocking, stand, warranty), and value per LED. No brand pays for a position. Full methodology.