Nanlite Forza 720B 800W Bi-Color Led COB Light- Lab-Review

Nanlite Forza 720B – Technical Analysis

The Nanlite Forza 720B is a high-output bi-colour COB monolight with a range from 2700K to 6500K. Measurements were taken at a distance of 1 m without modifiers, plus one measurement with the standard reflector, across a total of 9 individual measurements.

Scores and lab report based on the current version of our evaluation (October 2026). The power score refers to the output with the standard reflector (83,562 lux).

🔍 Key Measurements (White Light, 100%, 1 m)

---

🔎 Performance Analysis

💡 Light Output

The Forza 720B delivers very high output: unmodified, it reaches 21,199 lux at 5500K at a distance of 1 m (EV 13.0). 6500K is almost identical at 20,812 lux (about 2% less). Towards the warm end, output drops: 17,997 lux at 3200K (about 15% less) and 15,777 lux at 2700K (about 26% less).

With the standard reflector, the light reaches 83,562 lux at 5500K (EV 15.0), about four times the bare output.

Dimming is very close to linear:

At 3200K, the colour temperature is practically constant across the dimming range (under 1.5 MK-1). At 5500K, it rises from 5,690 K to 5,817 K, a drift of about 4 MK-1.

Standout Features:

• ✅ Very high output: 21,199 lux bare, 83,562 lux with reflector
• ✅ Even daylight output: 5500K and 6500K within about 2%
• ✅ Linear dimming: 10% power ≈ 10% light, 50% ≈ 50%
• ⚠️ Less output at warm CCTs: 2700K about 26% below 5500K

🎨 Colour Rendering (White Light)

CRI (Ra) sits between 96.4 and 97.5. R9 ranges from 87 at 2700K to 97 at 3200K. At 5500K, R9 drops from 91 at full output to 83 at 10%. TLCI (for information) reaches 97 to 99.

TM-30 Rf lies between 93 and 96, with Rg between 101 and 104. At 3200K, Rg 104 points to slightly increased saturation.

The SSI is 89 at 2700K and 82 at 3200K, and drops to 72 at 5500K and 69 at 6500K.

Standout Features:

• ✅ High colour fidelity: Ra 96.4–97.5, TM-30 Rf up to 96
• ✅ Very good SSI at 2700K: 89
• ⚠️ R9 varies: 87 at 2700K, 83 at 5500K and 10%
• ⚠️ Daylight SSI moderate: 72 at 5500K, 69 at 6500K

🧪 TM-30 in Detail

TM-30 divides colours into 16 hue bins. The local chroma shift (Rcs) shows whether a hue is rendered more or less saturated than under the reference light, the local fidelity (Rf,h) how accurately it is rendered overall. Shifts of a few percent are barely visible; from around 10%, the affected hues look noticeably more intense or duller.

2700K is the standout setting of the Forza 720B: all 16 hue bins stay within ±3%, local fidelity is 96 to 98 in most bins and only drops to 91 to 93 in blue, violet and red-purple. Only 6 of the 99 colour samples fall below Rf 90, and the weakest still reaches 85. Together with SSI 89, this is a very clean warm white.

At 3200K, blue (+5%) and violet (+4%) are slightly emphasised, which matches the Rg of 104. At 5500K and 6500K, the typical daylight pattern of phosphor-converted LEDs appears: purple (+9%) and violet (+11%) become more saturated, while fidelity in cyan-blue drops to 85–87. Cyan tones also shift slightly in hue (up to 0.09 at 6500K).

Skin tones in the orange-red and orange bins (2 and 3) are rendered very consistently: Rf,h 96 to 98 with saturation shifts of at most ±1% at every colour temperature.

The spectrum peaks at 632–635 nm in the warm settings and at 449–450 nm (blue pump) in the daylight settings.

Standout Features:

• ✅ Very clean warm white at 2700K: all hue bins within ±3%, only 6 samples below Rf 90
• ✅ Skin tones very stable: bins 2/3 at Rf,h 96–98
• ⚠️ Daylight pattern: purple/violet +9–11%, cyan-blue Rf,h down to 85

🌡️ CCT Accuracy

The deviation in Mired (MK-1) is more meaningful than the raw Kelvin difference, since the Kelvin scale is not linear:

In the warm range, the Forza 720B is excellent: 2700K and 3200K deviate by less than 2 MK-1. The daylight settings are noticeably cooler: 5500K measures 5,817 K (9.91 MK-1) and 6500K 6,955 K (10.06 MK-1), right at the threshold of around 10 MK-1 at which a shift becomes perceptible. When matching with other daylight sources, a slightly lower setting can help.

At 3200K, the CCT is spot-on, but Duv of -0.0052 shows a slight magenta tendency that stays almost unchanged across the dimming range (-0.0051 to -0.0054). The other settings are neutral.

Standout Features:

• ✅ Excellent at 2700K and 3200K: 1.77 and 1.55 MK-1
• ⚠️ Daylight at the threshold: 9.91 and 10.06 MK-1, slightly cool
• ⚠️ Slight magenta tendency at 3200K: Duv -0.0052

---

✅ Strengths

1. Very high output → 21,199 lux bare and 83,562 lux with the standard reflector at 5500K
2. Excellent CCT accuracy in the warm range → 1.77 MK-1 at 2700K, 1.55 MK-1 at 3200K
3. Very clean warm white → SSI 89, TM-30 Rf 96 and all hue bins within ±3% at 2700K
4. Linear dimming → 10% power ≈ 10% light, colour-stable at 3200K
5. Stable skin tones → Bins 2/3 at Rf,h 96–98 at every CCT

⚠️ Weaknesses

1. Daylight settings slightly cool → 5,817 K and 6,955 K, about 10 MK-1
2. Limited daylight spectrum → SSI 72 and 69, purple/violet oversaturated, cyan-blue Rf,h down to 85
3. Slight magenta tendency at 3200K → Duv -0.0052 across all dimming levels
4. Less output at warm CCTs → 15,777 lux at 2700K vs. 21,199 lux at 5500K
5. R9 variation → 87 at 2700K, 83 at 5500K and 10%

📉 Practical Applications

Ideal for: → Large tungsten-balanced sets: precise 2700K and 3200K with very high output → Warm interiors and evening looks at 2700K: the cleanest setting of this light → High-output daylight scenarios: large studios, bouncing through big modifiers → Interviews and narrative work: stable skin tones, linear dimming

Use with caution: → Exact daylight matching: 5500K and 6500K measure cooler than set → Spectrally sensitive daylight work: SSI 69–72 → Products in purple, violet or turquoise at daylight CCTs: visible deviations → Neutral, white backgrounds at 3200K: slight magenta tendency

📌 Conclusion

The Nanlite Forza 720B is a high-output, professional bi-colour monolight with excellent accuracy at 2700K and 3200K and very high output (21,199 lux bare, 83,562 lux with the standard reflector). Its 2700K setting is particularly clean, with SSI 89 and an almost neutral TM-30 profile.

The detailed analysis shows where compromises lie: the daylight settings measure around 10 MK-1 too cool and show the usual oversaturation in purple and violet, and 3200K has a slight magenta tendency despite its precise CCT. For large warm-light setups and high-output studio work, the 720B is an excellent tool; for precision-critical daylight work, a minor correction may be necessary.

Data Overview

📥 PDF herunterladen

TM-30-18

TM-30 Multi Report

TM-30 Comparison

Multiple Measurements in Direct Comparison

Report selection by CCT

All loaded reports are sorted by CCT automatically. The slider snaps to the nearest report.

–

Color Vector Graphic

Reference and test as closed 16-bin curves.

Click a CES cell to view vector and detail values.

Normalized Spectral Power Distribution

TM-30 Dashboard

Local shifts and radial visualization as in the standard report.

Local Chroma Shift (Rcs,hj)

Local Hue Shift (Rhs,hj)

Local Color Fidelity (Rf,hj)

Click one of the three local titles to see a short explanation of meaning and visual impact.

Color Sample Fidelity (Rf,CESi)

Direct overview of all 99 CES samples with fidelity values.

Measure Comparisons

Additional comparison view analogous to the TM-30 reference representation.

Color Evaluation Samples

Highlighted skin-tone areas provide practical orientation for portrait colors. Click to zoom.

Click a CES cell to view the comparison in the popup.

Related Articles

Copyright © of product image in the title image are the ones of the respective manufacturers. All rights reserved.