When Is a 30W/m Wide COB LED Strip Worth Buying? A Project Guide to Output, Fit and Cost
When Is a 30W/m Wide COB LED Strip Worth Buying? A Project Guide to Output, Fit and Cost
LikeLight Tom · Operations · Technical reviewer: pending confirmation
The decision in 30 seconds
A 30W/m COB strip is worth shortlisting when a deeper cove or larger receiving surface needs more usable light and can accommodate a 20mm source with suitable thermal support.
For a shallow shelf, narrow groove or modest accent level, begin with the compact L-S-COB family. Approve the lowest-load option that meets the installed lighting brief.
| Your buying task | First LIKELIGHT candidate | What decides the order |
|---|---|---|
| Narrow shelf channel; customers stand close | Compact L-S-COB | actual PCB fit, shielding, colour and accepted illuminance |
| Deep cove or larger indirect receiving surface | L-S-COB-DC24V-20mm | useful light after installation, thermal support and 24V branch load |
| Multi-store rollout with long operating hours | Compare both against one sample brief | accepted appearance plus installed and running cost |
Send your channel section, lengths, target appearance and country for a two-option sample quotation.
Three purchasing scenarios
These are hypothetical buying tasks, not claimed customer installations.
A. A shallow merchandise shelf
A buyer needs a continuous white line under eight short shelves. Customers see the shelf edge at close range, and the usable channel is only 12mm wide.
A 20mm PCB does not fit that channel. Start with a compact width that leaves installation tolerance and inspect source concealment. More input power cannot correct a physical-fit failure or glare.
B. A deeper hotel cove
A designer wants indirect light on a larger pale surface. The channel can accept a wider source and provide a suitable heat path.
The wide 30W/m model becomes a useful candidate. Compare a real cove sample at the required surface illuminance; approve it only if the additional load produces a visible benefit the lower-power option cannot deliver.
C. A chain-store refresh
An operator wants the same appearance across stores for 12 hours a day. Driver access, matching replacement pieces and operating cost matter alongside the first sample.
Compare both candidates using the same CCT, channel, diffuser, measurement points and operating schedule. Select one repeatable BOM for each installation zone, with labelled spares.
What LIKELIGHT publishes for the two candidates
| Field | Wide 20mm candidate [S1] | Compact family [S2] |
|---|---|---|
| Model | L-S-COB-DC24V-20mm | L-S-COB |
| Voltage | DC24V | DC12V or DC24V options |
| PCB width | 20mm product identification; tolerance to release | 5/8/10/12mm choices |
| Power | 30W/m | 7/8/9/10/12/14W/m choices |
| White CCT | 2700/3000/4000/6000K | white range listed as 2700–6500K |
| Output | manufacturer claim: 3300–3900lm/m ±5% | matched lumen report required |
| Protection | IP20 | IP20 |
Use these as two purchasing directions. The compact width, voltage, power and cut lists are a family menu; they are not a complete table of compatible combinations.
The wide product title includes “3072LEDs”. Its count basis is not established in the reviewed text, so this guide does not convert it into LEDs per metre.
View the wide COB product · View the compact COB family.
Why a higher-output source may help—or disappoint
Light travels through the diffuser, leaves the recess and reaches a surface. A deeper setback, diffuser loss and wall reflectance change the useful result. Input watts alone do not specify shelf or wall illuminance.
The wide model publishes a lumen range; the compact family does not provide a comparable output table. A same-watt or same-length comparison would not establish equal light at the merchandise.
Request order-specific photometry and compare the installed samples at fixed points. CIE 121 describes controlled measurement and reporting [S3]; it does not validate these product claims.
Higher load also increases the electrical and thermal work the assembly must handle. A wider board does not, by itself, approve a smaller heatsink or a sealed wooden recess.
An eight-metre decision tool
Assume 8m of dry indoor white-light installation. The compact 10 and 14W/m rows are separate possible order options; their widths and voltages must be released before ordering.
| Planning option | Strip load: 8 × W/m | Current if an approved 24V version is used | Preliminary supply capacity at a hypothetical 80% load policy |
|---|---|---|---|
| Compact 10W/m option | 80W | 3.33A | 100W |
| Compact 14W/m option | 112W | 4.67A | 140W |
| Wide 30W/m model | 240W | 10A | 300W |
Formulas: P = length × W/m; I = P ÷ V; planning supply capacity = P ÷ 0.8.
The 80% ratio is a teaching policy, not a universal rule. The final driver must satisfy its own voltage, dimming and thermal derating data [S4]. Cable and controller losses must also be considered.
Four hypothetical 2m wide-strip zones each have 60W and 2.5A of nominal strip load. This is an arithmetic partition, not an approved wiring plan or maximum-run claim.
The wide page's nominal lumen range gives 8 × 3300–3900 = 26,400–31,200lm before accounting for the stated tolerance. This is strip-level addition, not installed lux or a shelf-lighting target.
Put a purchase decision behind the numbers
If the compact sample meets the agreed illuminance and appearance, shortlist it for the narrow shelf. If it misses the larger cove target and the wide sample passes, shortlist the 30W/m version for that zone.
If both miss the target, revise the channel, optic or layout. Buying more watts without changing the failed geometry may add cost without solving the problem.
The operating-cost difference a buyer should see
Assume full nominal strip load for 12 hours/day and 300 days/year: 3600 operating hours. Actual dimming, driver losses and schedules will change the meter reading.
| Eight-metre option | Calculated strip-side energy/year |
|---|---|
| 10W/m | 288kWh |
| 14W/m | 403.2kWh |
| 30W/m | 864kWh |
The 30-versus-10W/m difference is 576kWh/year. Multiply 576 by the project's actual tariff for an initial monetary comparison. No local electricity price is assumed.
This is an input-energy comparison, not proof that compact COB is more efficient. Equal accepted lighting output must be demonstrated before making an efficiency claim.
Compare the complete installed package
| Buying dimension | Compact COB direction | Wide 30W/m direction |
|---|---|---|
| Visual result | strong first candidate for close, concealed accent light | candidate for a larger accepted light-output requirement |
| Installation space | width options suit tighter grooves after tolerance check | requires space for 20mm PCB plus fixing and leads |
| Driver and control | exact constant-voltage/dimming version must be fixed | 24V, greater nominal load per metre; dimmer capacity must match |
| Fault impact | depends on branch division and connections | greater load makes deliberate branch/service zoning valuable |
| Maintenance | accessible short pieces and matched spare bins | removable profile and reachable leads/driver |
| System cost | strip, profile/diffuser, driver, leads, installation and spares | same scope plus the load and thermal provisions the sample requires |
Use: project cost = strip + profile/diffuser + driver/dimmer + wiring/connectors + installation + sample/commissioning + spares + running cost + planned replacement.
The cheaper strip line can lose if its channel needs redesign. The higher-power line can lose if the sample shows no extra useful light. Require both quotations to price the same accepted brief.
What to request from LIKELIGHT
Send five inputs first: a dimensioned channel section; finished lengths; the surface/merchandise and desired appearance; operating hours and dimming; destination country and quantities.
Ask for a two-option response with exact white-light SKUs, CCT/bin, valid width-power-voltage combinations, cut unit, maximum powered run, thermal mounting detail and sample lead time.
The response should add a priced BOM for strip, profiles, driver/dimmer, leads/connectors and spares, plus a sample acceptance plan. Supply capability, MOQ, price and delivery remain subject to the actual quotation.
Approve one sample that can become a purchase order
- Build the real channel and receiving surface using the intended diffuser and source position.
- Label both sample SKUs; hold CCT, measuring points and brief constant.
- Record accepted illuminance, uniformity, glare and merchandise appearance.
- Run to stable operation; measure load, first/last voltage and relevant case/profile temperatures.
- Test the chosen dimmer at full and lowest useful level and after restart.
- Replace one planned section and record access and time.
- Freeze the winning zone-specific BOM, drawings, sample record and spare labels.
The sample should include the narrowest channel and most demanding lighting zone. A loose strip on a bench cannot answer either purchasing question.
When to choose another solution
- Do not choose the wide model where a 20mm board cannot fit or where its extra output has no accepted benefit.
- Do not choose a compact option that only meets the brief after unapproved electrical overdrive.
- Do not use either reviewed IP20 construction as an outdoor or wash-down system; select an appropriately evidenced assembly [S5].
- For animated RGB effects, request the separate colour/control version; this white-light decision tool does not establish an addressable interface.
Copy this inquiry to start the sample comparison
We need [8m] of white COB for [shelves/coves] in [country]. Channel section, finished lengths and target appearance are attached. Compare compact L-S-COB and L-S-COB-DC24V-20mm at the same CCT and acceptance target.
Please return exact SKUs, valid width-power-voltage pairings, cut/run limits, photometry, thermal detail, driver/dimmer, priced BOM, matching spares, sample price, MOQ and lead time. Mark unreleased fields clearly.
FAQ
Is the 30W/m model always the better choice?
It is a candidate for higher useful-output needs. For a narrow shelf, fit and accepted light at lower load can favour compact COB.
Can an 8m wide strip use one 24V feed?
Its nominal load is 10A. Maximum run, connector rating, conductor loss and the released feed plan decide the actual branches.
Does 3300–3900lm/m tell me the illuminance on a shelf?
No. It is a manufacturer source-output claim; channel, diffuser, aiming, distance and surface change installed lux.
Can I order any 5mm compact strip at 14W/m and 24V?
The family page does not establish that combination. Request a released SKU matrix rather than combining independent menu items.
Is a 300W driver automatically correct for the wide example?
No. It is the arithmetic result of the hypothetical 80% policy; check the actual driver's output, losses, temperature and dimming compatibility.
What evidence should match the accepted sample?
The order code, CCT/bin, output and colour report, thermal/electrical readings, drawings, driver/dimmer and production BOM.
Sources checked
2026-10-08
