Which projects need violet-excited full spectrum LED strip lights for photography and colour work?
Violet excitation earns its efficacy penalty wherever the camera or the eye is the instrument. LED strip lights for photography, video and colour grading, gallery and museum cases, dermatology and dental rooms, jewellery and cosmetics display, and paint, print or textile inspection all benefit from the smooth 420-500 nm region and TM-30 Rf around 93 that a 405 nm pump delivers. In those rooms the connected load is small, so 80-110 lm/W costs little and the colour gain is visible in every frame.
Why colour-critical rooms specify a violet pump
In a gallery the failure mode is not low CRI, it is selective distortion: a blue-pump board can make an ultramarine pigment read flat while a cadmium red reads muddy, even at Ra 95. The violet-pumped curve has no dominant spike, so hue vectors stay short and every pigment shifts by a similar, negligible amount.
UV load is the second reason. A 405 nm die sits below the blue-hazard peak and DENO measures UV-A leakage under 2 µW/lm, comfortably inside conservation guidance for textiles, works on paper and pigments. Blue-pump boards concentrate more energy at 450 nm, which is the band photobiological standards weight most heavily.
Budgeting for the efficacy trade
Expect 80–110 lm/W instead of 120–150 lm/W. On a display case or a treatment room that difference is a few watts; across a whole floorplate it becomes a compliance problem. The usual solution is a mixed scheme: violet-excited tape inside vitrines, casework and task zones, blue-pump full spectrum tape in the surrounding coves.
Both families share the same FPCB stack-ups, widths, densities, IP classes and cut units, so a mixed scheme uses one set of profiles, drivers and accessories.
Industry references and standards
- Metrology & laboratories — ANSI/IES TM-30 Colour Rendition Method — Rf / Rg fidelity and gamut metrics quoted throughout our spectral data.
- Museums & conservation — CIE 157: Control of Damage to Museum Objects by Optical Radiation — Exposure limits and damage factors used by museum lighting schedules.
- Metrology & laboratories — NIST Optical Radiation Measurement — Traceable photometric and spectroradiometric measurement references.
More full spectrum answers
- What is the difference between a high CRI LED strip and a full spectrum LED strip?
- Is violet-excited high CRI LED lighting better than a normal blue-chip white LED?
- Is 90 CRI enough, or do you need a 95 or 98 CRI LED strip?
- Which high density LED strip stops you seeing dots in a shallow cove?
- Are high CRI LED strips available in 24V, and do they dim without changing colour?
- Can you use a full spectrum LED strip to grow plants?