24W vs 48W vs 96W LED Wall Washers: How to Choose for Your Facade

LikeLight Tom · Operations · Technical reviewer: pending confirmation

Quick selection answer

Choose the power class only after fixing the facade geometry and asking for optical evidence. LIKELIGHT publicly presents 24 W/m, 48 W/m and 96 W/m options in one outdoor wall-washer family [S1]. That makes a useful quotation ladder, but it does **not** prove that 96 W is three times as bright on the wall as 24 W.

These are screening hypotheses, not guaranteed application limits. Wattage describes electrical input; the wall effect also depends on intensity distribution, beam, setback, aiming, surface and losses. CIE documents how luminaire photometric characteristics are measured [S4], while IES LM-63 provides a standard photometric-data format [S5].

1. Start with the effect the buyer wants

Before comparing price, choose one target:

• **Uniform wall wash:** smooth vertical coverage with controlled scallops.
• **Grazing:** close mounting that deliberately reveals stone or brick texture.
• **Color-changing facade:** RGB/RGBW scenes with DMX control.
• **White architectural light:** defined CCT, CRI, output and uniformity.
• **Outline/accent only:** visual emphasis without lighting the full height.

Two buyers can request “48 W wall washers” and need different products because one has a 3 m hotel wall and the other a 15 m public facade. Send the drawing first, not just the wattage.

2. Published LIKELIGHT product matrix

The public L-W-10048 page contains several configurable values and a model-name string that should not be treated as one universal stock SKU. The quotation and approved data sheet must freeze the delivered combination.

3. Worked quantity and connected-load example

Assume a straight 30 m facade is divided into thirty 1 m bays, with one 1 m luminaire per bay. This is a purchasing example, not a lighting design.

This table does not size breakers, drivers or cables. Add returns, corners and openings from the drawing; then calculate supply losses, derating, inrush, voltage drop and local code margins separately. If the 30 m facade uses a different module length or spacing, quantity changes.

Price comparison that avoids a false bargain

Compare the complete installed system, not fixture price alone:

`system cost = fixtures + power/control + cable/connectors + mounting + commissioning + access/maintenance`

A higher-power fixture may reduce quantity in some layouts, but that conclusion requires photometric proof. A lower-power fixture can cost more if it forces tighter spacing or extra circuits.

4. The quotation checklist

Send these items to LIKELIGHT for a useful first quotation:

1. Facade elevation and dimensions, including corners, windows and setbacks.
2. Site photos plus wall material and color.
3. Mounting location, distance from wall, aiming limits and accessible fixing method.
4. Required effect: uniform wash, graze, accent, RGB scenes or specified white light.
5. Target height, viewing distance and any illuminance/luminance requirement.
6. Preferred 24/48/96 W option—or ask for two options if undecided.
7. Voltage, available circuits, cable route and maximum branch length.
8. RGB/RGBW/white, CCT/CRI target and control method.
9. Outdoor exposure, IP/corrosion requirement and installation country.
10. Quantity, sample deadline, project deadline, packaging and certification needs.

With those inputs, the supplier can return an option matrix instead of a price for an undefined lamp.

5. A buyer-friendly approval workflow

1. Freeze the facade drawing and visual objective.
2. Shortlist two power/beam combinations, not three wattages alone.
3. Obtain exact data sheets and IES/LDT files for the offered SKUs.
4. Run a lighting calculation using the real mounting geometry.
5. Buy samples and build a night-time mock-up on the actual material.
6. Check uniformity, upper-wall reach, glare, color, dimming, camera behavior and thermal/electrical conditions.
7. Sign the approved sample, model code, wiring, connector, control mode and acceptance criteria.
8. Release the order only after quantity and accessory BOM match the final drawing.

6. When not to choose 24 W, 48 W or 96 W

• Do not choose **24 W** merely because its unit price and power are lower; reject it if optical evidence cannot meet the height and uniformity target.
• Do not choose **48 W** as an automatic “middle safe choice”; the wrong beam and setback can still create hot spots and dark bands.
• Do not choose **96 W** merely to create safety margin; excess output can add glare, load, heat and control difficulty.
• Do not choose an **AC220V** version until local electrical rules, isolation, protection, connection and maintenance are approved.
• Do not choose **RGB** when regular high-quality white light is essential without approving mixed-white performance.
• Do not finalize any power class without the exact SKU, photometric data and representative mock-up.

7. Recommended inquiry format

Use this short message:

> Project: 30 m × [height] facade in [country]. Mounting setback: [x] m. Wall: [material/color]. Effect: [uniform wash/graze/RGB/RGBW/white]. Please compare 24 W, 48 W and 96 W options with quantity, beam, voltage, control, IP, photometric file, accessories, unit/system price, sample lead time and production lead time.

LIKELIGHT can then compare a published family [S1] with the 36 W DC24V DMX alternative [S2] instead of guessing from a one-line request.

FAQ

Is 96 W always brighter than 48 W on the wall?

Not in a predictable ratio. Input power, efficacy, optics, aiming, distance and surface determine the measured result. Compare photometric files and a mock-up.

Is 48 W the safest general choice?

It is a useful comparison point, not a universal answer. Geometry and target effect still decide.

How many 1 m wall washers are needed for a 30 m facade?

The worked one-per-1 m-bay example uses 30, but corners, gaps, openings, spacing and module length must come from the final drawing.

Should I choose AC220V or DC24V?

Choose only after reviewing local rules, circuit architecture, voltage drop, protection, cable route and maintenance. The published family mentions both options [S1].

Can wattage replace an IES file?

No. Wattage is electrical input; an IES/LDT file describes measured light distribution for calculation.

What should I send to get a quote quickly?

Send the facade drawing, photos, dimensions, mounting geometry, target effect, color/control, voltage, environment, quantity and schedule.

Sources checked

2026-09-16

1. S1: LIKELIGHT — AC220V/DC24V 24W, 48W and 96W wall washer
2. S2: LIKELIGHT — 36 W DC24V RGB DMX wall washer
3. S3: LIKELIGHT — How to Choose LED Wall Washer Lights for Outdoor Building Lighting
4. S4: CIE 121-1996 — The Photometry & Goniophotometry of Luminaires
5. S5: IES Lighting Library — ANSI/IES LM-63-19

LIKELIGHT 24W / 48W / 96W LED wall washer series

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