The sticker price is not the real cost. A $700 QLED and a $750 OLED look nearly identical at checkout, but electricity draw, panel longevity, and burn-in risk pull the two technologies apart over five years of daily use. QLED Mini-LED sets like the TCL QM6K typically run a brighter backlight for longer hours, while OLED panels like the LG B4 sip less power on average scenes but wear unevenly if you leave static content on screen.
Total cost of ownership means purchase price plus estimated electricity over five years, weighed against how each panel type ages. ENERGY STAR Televisions Version 9.0 publishes the annual kWh estimates that make this comparison possible, and that number, not the nits on the box, is what decides your power bill five years from now.
Why sticker price is not the same as 5-year cost
Two TVs at the same $750 price point can differ by 30 to 50 kWh a year once you account for panel technology and screen size. At a typical US residential rate of about 16 cents per kWh, that gap adds up to $25 to $40 a year, or $125 to $200 over five years — often enough to have bought the pricier set outright.
Purchase price also moves over time. Budget QLED and OLED sets both see markdowns during major sales periods, so the “under $800” launch price is rarely what a careful shopper actually pays. Tracking a price history for a few months before buying typically saves more than any single spec difference.
Stage boxes showing the three components of 5-year TV cost: purchase price, electricity, and longevity risk
How OLED burn-in risk actually works (and when it matters)
OLED pixels are self-emissive — each one produces its own light and color rather than being lit by a backlight. That means every pixel ages based on exactly how much current has passed through it. A pixel that displays a bright white logo in the same screen position for thousands of hours will emit less light over time than its neighbors, creating a faint, permanent ghost of that image. This is differential aging, and burn-in is what happens when the difference becomes visible.
In practice, burn-in on modern OLED panels is a slow-accumulation risk tied to static content, not general viewing. Streaming, sports, and gaming with varied content are low risk because no single pixel pattern stays fixed for long. A permanent news ticker, a 24/7 security-camera feed, or a paused game HUD left on screen for days at a time is the scenario that actually causes visible burn-in over a 5-year ownership window.
Try this before you buy: if your household regularly leaves the TV on a fixed channel logo, a stock ticker, or a paused screen for hours at a stretch, that use pattern — not the panel technology in general — is the deciding factor against OLED.
Why QLED Mini-LED backlights cost more to run than OLED panels
QLED is not self-emissive. A QLED or Mini-LED QLED panel uses an LED backlight shining through a liquid-crystal layer and a quantum-dot film that converts the light to more saturated color. To hit the bright, punchy HDR highlights QLED sets are marketed on, the backlight has to run at meaningfully higher output than an OLED panel showing the same scene at typical living-room brightness.
That backlight draw is the main reason budget Mini-LED QLED sets tend to post higher ENERGY STAR annual kWh figures than similarly sized OLED sets at typical picture settings, even though OLED can draw more power than QLED on all-white, very bright scenes because every pixel is generating its own light at once. For most mixed content — the kind an actual household watches — the backlight-driven QLED set is the more power-hungry of the two.
The upside: a Mini-LED QLED backlight doesn’t develop pixel-level differential aging the way OLED does, so QLED sets carry no meaningful burn-in risk and their brightness fades more uniformly across the whole panel over years of use, which is what “longer luminance half-life” means in practice.
TCL QM6K vs Hisense U7N vs LG B4: measured power and price
This comparison uses each manufacturer’s published specifications and the ENERGY STAR product database, not a hands-on lab test of every retail unit. Treat the kWh figures as typical estimates for comparable screen sizes, since actual draw shifts with picture mode and backlight setting.
| Model | Panel type | Typical annual energy | Longevity consideration |
|---|---|---|---|
| TCL QM6K | QLED Mini-LED | Typically higher than comparable OLED at bright HDR settings, due to backlight draw | No burn-in risk; brightness fades gradually and uniformly across the panel |
| Hisense U7N | QLED Mini-LED | Similar band to QM6K; scales up with screen size and peak-brightness picture modes | No burn-in risk; local-dimming zone count affects long-term uniformity |
| LG B4 (48-inch) | OLED (WOLED) | Typically lower than QLED Mini-LED on mixed content; can spike on very bright, mostly-white scenes | Burn-in risk only with static content held for extended periods; panel includes pixel-refresh and logo-dimming safeguards |
TCL QM6K pros: strong peak brightness for the price, no burn-in exposure, good pick for a bright room with varied content. Cons: higher typical running cost and a genuine reason not to buy if your electricity rate is high and the TV runs many hours a day. Hisense U7N pros: similar brightness advantages to QM6K at a competitive price. Cons: same backlight-driven power draw as QM6K.
LG B4 pros: lower typical running cost on most content and deep, uniform blacks. Cons: not the right choice for a household that regularly leaves static content on screen for hours — a real reason to choose QLED instead.
How to estimate your own 5-year cost before you buy
You do not need a lab to get a workable estimate. The ENERGY STAR label or product page lists an estimated annual energy use in kWh for the specific model and size you’re considering. Multiply that by five, then multiply by your utility’s per-kWh rate, which is printed on your electric bill.
Four steps combining ENERGY STAR annual kWh, electricity rate, purchase price, and static-content habits into one 5-year comparison
This four-step method is a practical evaluation approach created for this guide based on the cost factors described above, not a published industry standard. It’s meant to replace guessing with your own household’s actual numbers, since your hours of use and local electricity rate matter more than any generic comparison.
In the settings menu, look for: your TV’s power-consumption estimate, usually under a general or eco settings menu, which can confirm whether your specific picture mode tracks close to the ENERGY STAR estimate or runs meaningfully brighter.
The Practical Verdict
Neither technology is categorically cheaper to own — it depends on how you watch. A household that keeps content varied and wants the lowest running cost over five years typically comes out ahead with an OLED like the LG B4. A household that wants maximum brightness for a sunlit room, runs the TV as background static content for long stretches, or simply wants zero burn-in risk typically comes out ahead with a QLED Mini-LED set like the TCL QM6K or Hisense U7N, even at a somewhat higher electricity cost. Run your own numbers with your actual electricity rate before deciding — the gap is real but it is calculable, not a guess.
Frequently Asked Questions
Is OLED or QLED cheaper to run over 5 years?
OLED typically costs less to run on mixed, varied content because backlight-driven QLED sets push more constant power for bright HDR highlights. On very bright, mostly-white content, OLED’s self-emissive pixels can draw more power than QLED’s backlight.
Does burn-in actually happen on modern budget OLED TVs?
It can, but only from extended static content like a fixed channel logo or paused screen held for hours at a time across months. Normal streaming, sports, and varied gaming carry low practical risk on current panels with pixel-refresh safeguards.
Do QLED TVs have any long-term aging risk at all?
Yes, but differently. QLED backlights and quantum-dot layers lose brightness gradually and uniformly across the whole panel over years, rather than in a localized pattern, so there’s no visible ghost image risk the way OLED has.
How do I estimate my own 5-year electricity cost before buying?
Check the model’s ENERGY STAR annual kWh estimate, multiply by 5, then multiply by your rate per kWh from your utility bill. Add that number to the actual price you expect to pay after typical sales markdowns.
