Quick Answer
Buy the iRestore Professional (~$899) if you will actually do three sessions a week: it publishes 1,410 mW across 282 diodes at 655nm, and total delivered energy is the one variable the published research keeps tying to hair density. Buy the Theradome PRO LH80 (~$995) if you won't: 20 minutes twice a week is 40 minutes total, roughly half what any iRestore asks, and a device you use beats a device you own. Theradome's headline argument, that its 80 lasers beat iRestore's 500 diodes, does not survive both brands' own spec sheets, because Theradome publishes 5 mW per diode and iRestore classes its lasers at the same Class 3R under 5 mW. The real split is time versus dose, not laser versus LED.
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Last reviewed: September 2026
Buy the iRestore Professional if you will genuinely sit under a cap for 25 minutes three times a week. Buy the Theradome PRO LH80 if you know you won't. That is the whole decision, and it has almost nothing to do with the argument both brands spend their marketing budgets on.
We run a red light panel at home and have done for over two years, so the dose arithmetic below is familiar ground. We have not worn either of these helmets. Everything here about the devices comes from both manufacturers' own specification blocks, fetched on 30 September 2026, plus the published clinical literature on low-level laser therapy. Not from our own scalp. We have flagged which is which, because on hair loss the difference between "we measured this" and "the brand printed this" matters more than usual.
What makes this comparison awkward is that the two brands do not publish the same numbers. iRestore prints a total power output for every model. Theradome prints power per diode and a target dose, and no total at all. Almost every comparison you will read papers over that gap. We have left it visible.
If you are still deciding whether a laser cap is worth buying at all, our red light therapy for hair loss guide covers the evidence before the shopping, and FDA-cleared red light therapy devices explains what "cleared" does and does not mean.
Quick Comparison: Theradome vs iRestore, 2026
| Product | Best For | Price | Diodes (lasers / LEDs) | Wavelengths | Total output | Rating |
|---|---|---|---|---|---|---|
| iRestore Professional | Best overall, most published dose per dollar | ~$899 | 282 (82 / 200) | 655nm | 1,410 mW | 4.4/5 |
| Theradome PRO LH80 | Fewest sessions, 40 minutes a week | ~$995 | 80 (80 / 0) | 680nm ±3nm | Not published | 4.2/5 |
| iRestore Elite | Highest output, shortest single session | ~$1,899 | 500 (300 / 200) | 625 / 655 / 680nm | 2,500 mW | 4.1/5 |
| Theradome EVO LH40 | Cheapest 100%-laser helmet | ~$695 | 40 (40 / 0) | 680nm ±3nm | Not published | 4.0/5 |
| iRestore Essential | Cheapest way in | ~$499 | 120 (51 / 69) | 655nm | 600 mW | 3.9/5 |
Prices and specs checked against each manufacturer's own product page on 30 September 2026, and they move, so confirm before you buy. Three notes. The Theradome figures come from theradome.com; the PRO LH80's Amazon listing was also $995 on the same day, and the EVO is sold on Amazon only through third-party listings whose prices vary far too widely to quote. iRestore's own site prices the Professional and Essential well above Amazon ($1,499 and $799 respectively against $899 and $499), so the Amazon figures are the ones we link and the ones in the table. Theradome publishes no total power output for either helmet. That cell is not an omission on our part.
Why "80 lasers vs 500 diodes" is the wrong argument
Theradome's central marketing claim is that its 80 lasers beat a rival's hundreds of diodes, and it puts a number on it: 80 car batteries against 500 watch batteries. It is a good line. It is also checkable against both brands' own spec sheets, and it does not hold up.
Theradome's own science page states 5 mW per laser diode. iRestore's specification block, on every one of its three models, lists Laser Power Classification: Class 3R (<5mW). Per diode, the two brands are in the same power class. Nobody is running watch batteries.
What actually differs is how many emitters there are and how long you sit under them. That matters because the published research on low-level laser therapy keeps pointing at total delivered energy, not diode type. A 2020 analysis of summary-level data across photobiomodulation trials found that each extra 1 J/cm² of per-session fluence was associated with an increase in hair density of 0.23 hairs/cm² (95% CI 0.21–0.25). Dose is the lever the studies can see.
Run the brands' own published numbers through a week and the gap is large. iRestore Professional: 1,410 mW × 25 minutes × 3 sessions. iRestore Elite: 2,500 mW × 12 minutes × 7. Theradome publishes no total, so the only figure available is our own arithmetic from its 5 mW per diode. 80 × 5 mW gives 400 mW for the PRO LH80, which across 20 minutes twice a week lands at roughly a seventh of the Professional's weekly energy and a thirteenth of the Elite's. That number is ours, derived from Theradome's published per-diode figure, not a Theradome specification, and it should be read as an estimate rather than a measurement.
The honest counterweight: dose is not the only published finding. A meta-analysis of photobiomodulation for androgenetic alopecia (Gupta and Carviel, J Dermatolog Treat 2021, PMID 31746251) reported in a subgroup analysis that laser-only treatment was significantly more effective than combined laser/LED treatment (p = .009), though the combination still beat control. That is one subgroup in one meta-analysis, not a settled result. But it is the only piece of published evidence that supports Theradome's design choice, and it deserves to be on the page.
So: iRestore has the dose argument, Theradome has a thin slice of the purity argument, and neither is decisive. Which is why the tiebreaker ends up being how many evenings a week you will actually give this thing.
Theradome PRO LH80: ~$995
Theradome's flagship: 80 VL680 lasers, no LEDs at all, at 680nm ±3nm. Twenty minutes, twice a week, and it shuts itself off. Battery is 2,200 mAh and Theradome rates the lasers at 18,000 treatments when used twice weekly, which at two sessions a week is a lifespan no owner will reach.
The thing worth knowing before you buy is the warranty, because Theradome's own product page says two different things. The specification block reads Manufacturer Warranty: 1 Year. Elsewhere on the same page it badges a 5-Year Extended Warranty under the DomeCare name. We use the one-year figure throughout, because a disputed number should never be resolved in the product's favour, and if you are buying partly on the five years you should confirm in writing what DomeCare actually includes and whether it is bundled or sold separately.
Pros: 40 minutes a week, the lowest time commitment of any device here by a wide margin. Cordless and fully automated. Single 680nm wavelength, which is the one Theradome builds its whole clinical argument around. Genuinely 100% laser, which no iRestore model is.
Cons: No published total power output, on either the product page or the science page, so you cannot compare it like for like against anything. Contradictory warranty statements on one page. The most expensive Theradome, and $96 more than an iRestore Professional that publishes everything.
Best for: anyone whose previous hair device died of neglect. Forty minutes a week is the realistic end of this category.
iRestore Professional: ~$899
282 diodes, split 82 lasers and 200 LEDs, 1,410 mW total output, 655nm, Class 3R. Twenty-five minutes, three times a week. Two-year warranty included, with a four-year upgrade offered at $49.
This is the model that makes the fewest claims and prints the most numbers, which after reading four other product pages this week is worth something. It also carries the widest price spread of anything here: $899 on the Amazon listing we link against $1,499 on iRestore's own site, a $600 gap on the same device. Check both before buying; the direction of that gap has no reason to stay fixed.
Pros: Every headline spec published and checkable. Roughly seven times the weekly delivered energy of the Theradome PRO on the brands' own figures. Cheapest of the three iRestore models that reach the crown properly. The $49 warranty upgrade is priced sanely.
Cons: 75 minutes a week is nearly double the Theradome PRO. Two-year base warranty is the shortest in this comparison. 200 of its 282 diodes are LEDs, which is exactly the design that came off worse in the Gupta subgroup analysis.
Best for: most buyers. It is the best-documented device here and the cheapest route to a dose the literature would recognise.
iRestore Elite: ~$1,899
The most powerful home device either brand sells, and iRestore says so on the page: 500 diodes (300 lasers, 200 LEDs), 2,500 mW total, three wavelengths at 625, 655 and 680nm, and a 12-minute daily session. Three-year warranty included, five years for $99, and a 12-month money-back guarantee.
The 12-minute session is the real feature. Daily use at 12 minutes is 84 minutes a week, more than the Professional, but no single sitting is long enough to resent. Whether that suits you depends on whether your problem is total time or attention span.
Read the pricing carefully. iRestore shows $1,899 as a sale price saving $800 against a "Total Value" of $2,699, but that $2,699 is the value of a bundle, not a former price for the device. The Amazon listing is $1,899 flat with no such framing, which is the cleaner number.
Pros: Highest published output of any device here. Only model with three wavelengths. Longest included warranty at three years. 12-month money-back guarantee is unusually generous for a device that needs months to show anything.
Cons: More than twice the Professional for 77% more output. Daily use is a real commitment. Bundle-value pricing on the brand's own site makes the discount look larger than it is.
Best for: someone who has already tried a cheaper cap, didn't stick with it, and thinks a 12-minute daily habit is more survivable than a 25-minute one.
Theradome EVO LH40: ~$695
Half the lasers of the PRO LH80. Forty of them, same 680nm, same 5 mW per diode, same 2,200 mAh battery, and Theradome compensates by doubling the schedule to four sessions a week. Twenty minutes each, so 80 minutes weekly, which is within a rounding error of what the iRestore Professional asks.
That is the catch nobody mentions. The EVO is the cheapest way to own a 100%-laser helmet, but it surrenders the exact advantage that makes Theradome worth considering. Buy it for the laser purity argument, not for convenience.
Pros: Cheapest 100%-laser device in this comparison at $695. Identical wavelength and per-diode power to the flagship. Same cordless, auto-shutoff design.
Cons: Four sessions a week erases Theradome's headline advantage. Same unpublished total output and same one-year-versus-five-year warranty muddle as the PRO. Amazon stock is third-party only, at prices we could not reconcile.
Best for: buyers who specifically want laser-only and will not pay $995 for it.
iRestore Essential: ~$499
120 diodes (51 lasers, 69 LEDs), 600 mW total, 655nm, 25 minutes three times a week. Two-year warranty, four-year upgrade at $39.
At $499 it is the cheapest entry either brand offers, and the spec explains why: 600 mW is under half the Professional's 1,410 mW for 55% of the price, and the session length is identical. You pay 55% as much, give up the same 75 minutes a week, and receive 43% of the energy. On the fluence-dose relationship the literature describes, that is the worst trade in this table.
Pros: Lowest price of entry. Same published-spec transparency as the rest of the iRestore line. Same 12-month money-back guarantee.
Cons: Identical time cost to the Professional for well under half the output. Coverage is described as top scalp, hairline and crown rather than the Professional's maximum coverage.
Best for: early, localised thinning at the crown where the budget genuinely stops at $500.
Buyer's guide: what actually decides this
Start with the calendar, not the spec sheet
Weekly time is the number to write down first: Theradome PRO 40 minutes, Professional and Essential 75, Theradome EVO 80, Elite 84. Laser caps need months of consistent use before anything shows, and the device you abandon in week six has an output of zero regardless of what it publishes. If 75 minutes a week sounds like a stretch, the Theradome PRO's 40 is not a gimmick. It is the product.
"FDA-cleared" is real, but it is not "FDA-approved"
Every device on this page is FDA-cleared, and both brands say so accurately. Clearance under the 510(k) route means the FDA agreed the device is substantially equivalent to something already on the market. It is not a finding that it will regrow your hair. One systematic review of home-use LLLT devices counted only 32 that had been through the FDA process as of January 2020, so clearance does separate these brands from the unregulated end of the category. It just does not do the work the marketing implies.
Expect months, and expect modest
Pooled results are real but small. A 2026 systematic review and meta-analysis of lasers and energy-based devices in androgenetic alopecia reported a mean increase of 18.56 hairs/cm² and 10.62 µm of shaft thickness against sham. An earlier review found 9 of 11 studies measuring hair count or density reported statistically significant improvement in both men and women. Research suggests these devices do something measurable. Nothing in that literature suggests they do it quickly or dramatically.
Read the warranty before the discount
Included warranties here run from one year (Theradome PRO, per its own spec block) to three (iRestore Elite), with paid extensions at $39, $49 and $99. iRestore publishes a 12-month money-back guarantee on its devices; Theradome's page does not state an equivalent. On a device you are asked to use for six months before judging, a return window longer than the trial period is worth more than a hundred extra diodes.
FAQ
Is Theradome better than iRestore?
Neither brand is better across the board, and the published specs split cleanly. Theradome asks the least of your week, 40 minutes for the PRO LH80 against 75 to 84 for any iRestore, and is the only one of the two using 100% laser diodes. iRestore publishes a total power output for every model and delivers several times more weekly energy at a lower price. If you will do three sessions a week, iRestore's Professional is the better buy at ~$899. If you know you won't, Theradome's PRO LH80 at ~$995 is worth the premium for the schedule alone.
How many diodes do you actually need in a laser cap?
Diode count on its own tells you very little, because it says nothing about the power of each diode or how long you use the device. Both brands rate their lasers in the same class. Theradome publishes 5 mW per diode and iRestore lists Class 3R (<5mW), so counting diodes is really a proxy for total output. Compare the total power output figure where the brand publishes one (iRestore does; Theradome does not), and then multiply by session length and weekly frequency. That product is what the research on fluence actually tracks.
Do laser caps work for hair loss?
Research suggests a modest, real effect. A 2026 systematic review and meta-analysis found low-level laser therapy produced a mean increase of 18.56 hairs/cm² in density and 10.62 µm in shaft thickness compared with sham devices. An earlier review found 9 of 11 studies measuring hair count reported statistically significant improvement in men and women. These are small gains over months of consistent use, not restoration, and studies indicate they work best on early thinning rather than established bald areas.
How long before a laser cap shows results?
Both brands frame results in months, not weeks. Theradome's own page claims hair loss stops within 30 days and visible growth by 90 days. That is a manufacturer claim, not a trial result. The published trials generally run 16 to 26 weeks before measuring. Plan on using the device consistently for at least four to six months before deciding whether it did anything, and take a baseline photo on day one, because incremental change is close to invisible without one.
Is the iRestore Elite worth twice the Professional?
Only if the session length is what would stop you using it. The Elite publishes 2,500 mW against the Professional's 1,410, which is 77% more output for roughly twice the money, and splits it into 12-minute daily sessions instead of 25-minute ones three times a week. That is 84 minutes a week against 75, so it is not a time saving overall, just a smaller commitment per sitting. The Elite's three-year included warranty and three wavelengths are genuine advantages; the price gap is hard to justify on output alone.
Can you use a laser cap with minoxidil?
Yes, and the combination is the most studied version of this question. A 2025 systematic review and meta-analysis of randomised controlled trials found combining low-level laser therapy with topical minoxidil was associated with a greater increase in hair density than minoxidil alone (mean difference 6.62). A separate systematic review and meta-analysis of the same comparison found no statistically significant difference in hair counts between the two groups at baseline, 12 weeks, or 8 weeks post-treatment, so the evidence is not unanimous and the follow-up periods are short. Neither device carries a contraindication against topical treatments, but check with a doctor before combining anything.
Do these caps work on a completely bald scalp?
No, and neither brand claims otherwise. Low-level laser therapy stimulates follicles that are still present but miniaturised. It does not create new ones. The published trials recruit people with pattern thinning, typically Norwood III to VI in men and Ludwig I to II in women, not fully bald areas. If a region has been smooth for years, the follicles are likely gone and a laser cap has nothing to act on.
Our Verdict
If we were starting over today, we would buy the iRestore Professional at ~$899. It publishes every number a buyer needs (282 diodes, 1,410 mW, 655nm, Class 3R), which is more than Theradome does for either helmet, and it delivers roughly seven times the weekly energy of the Theradome PRO on the brands' own figures while costing $96 less. Total delivered dose is the variable the clinical literature keeps finding a relationship with, and the Professional is the cheapest honest way to reach a meaningful one.
The exception is real, though, and we would not talk anyone out of it. If your history with equipment like this is three good weeks followed by a shelf, the Theradome PRO LH80 at ~$995 is the better device for you, because 40 minutes a week is roughly half what any iRestore asks and adherence beats output every time. Just go in knowing you are paying a premium for the schedule, not for the lasers, and get the warranty position in writing before you hand over the money.
We would skip the Essential, because identical time cost to the Professional for 43% of the output is the worst value on this page. We would only take the Elite if a 12-minute daily habit is genuinely more survivable for you than a 25-minute one three times a week.
Next: our red light therapy wavelengths explainer covers why 655nm and 680nm both show up here, and the red light therapy hub has the rest of the category. More about how we work is on our about page.
Our Top Pick
iRestore Professional Laser Hair Growth System
From ~$899
Before you buy
Where the premium is materials, not marketing
We take the spec sheets apart across saunas, cold plunge, red light and recovery — and show where the flagship price buys real hardware, and where it just buys the logo.
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