CTO-002 Color Temperature Orange (Warming) Filter

CTO-002 is a medium-strength “warm-amber” correction filter—about a ½-CTO step—for dialing cool-white LEDs or daylight fixtures down toward a tungsten look without sacrificing too much output. It transmits roughly 25 % at 400 nm, sits near 19 % around 450 nm, then climbs smoothly: crossing 50 % by ~ 550 nm and peaking close to 88 % near 630 nm before tapering through the far red. The gradual rise trims excess blue, lifts amber–red energy, and typically shifts a 5600 K source to the 4000 – 4300 K range—warm enough to match practical lamps while keeping skin tones natural.

Key advantages

• Moderate ½-CTO shift – Drops CCT by ~1500 K, perfect for mixing daylight heads with tungsten fills.

• High red throughput – > 80 % above 600 nm preserves brightness and renders warm colours accurately.

• Smooth blue cut – No sharp notches, so spectra stay camera-friendly without green spikes.

• Heat-resistant oxide coating – Handles high-power HMIs, LEDs, and xenon follow-spots far beyond the limits of plastic gels.

• Custom formats – Round, square, or free-form blanks from 5 mm to 450 mm, 0.21 – 3.8 mm thick, on Borofloat®, soda-lime, Schott D263 T, or Corning Eagle XG glass.

Typical applications

• Film & broadcast lighting – Warm daylight panels or HMIs so they grade smoothly with tungsten practicals.

• Stage & architectural rigs – Soften cool LED house lights for intimate amber ambience without gel swaps.

• Photography modifiers – Bring strobes closer to incandescent colour without stacking multiple sheets.

• Museum & retail displays – Enhance warmth in exhibits while keeping UV well below conservation limits.

• Machine-vision lighting – Boost red-channel contrast for inspecting organic materials or heat-printed codes.

Need a prototype in days or production volume next month? CTO-002 filters can be coated, cut, and shipped to your exact specification—fast.