buildfor.life

Comparisons

Household Lamps

Measured luminous flux, efficacy, spectra, CRI, and TM-30 color rendering of household lamps of every technology: LED, halogen, CFL and more, tested in our integrating sphere under identical conditions.

Every lamp on this page was measured in our HPCS-6500 integrating sphere, powered at 230 V / 50 Hz by the sphere’s built-in supply, after a stabilization period. Each published value is the average of five consecutive readings. Every lamp carries an internal ID (L0001, L0002, …) as its primary reference: one EAN barcode can cover several versions of a lamp (daylight and warm white in the same box art), so the barcode, where the lamp has one, is listed in the specs but does not identify the sample. Where the packaging advertises flux, color temperature, or power, those claims are published next to our measurements.

The spectrum (380 to 1050 nm), the ANSI/IES TM-30-18 color rendering analysis computed from that spectrum, and the full metrics of every lamp are published below as raw files. The instrument driver and the TM-30 tooling are open source at git.b4l.co.th/B4L/HPCS6500-py.

Reproducible by design

Every device on this page ran the identical, versioned test procedure.

Read the full procedure

Measurements

Type
Light color

All lamps at a glance

Efficacy against color rendering, one dot per lamp. Hover a dot to identify it, click it to open the lamp's page.

Pick lamps to compare

Up to 6 lamps plot at once so each keeps a distinct, colorblind-safe color. Click a column header to sort. All values are measured; the claim columns compare against the packaging. New to the metrics? The glossary below explains every column.

LampBrandTypeWlmlm/WCCTRaR9RfRgPFFlux vs claimCCT vs claimRaw
TK-A013 (warmlight)TKLLED11.279070.3297168.9-42721200.93n/a✓SPDTM-30JSON
BULB DIMMER 9W (warm white)LAMPTANLED9.01186132.2308483.810891080.72+24.9 %+384 KSPDTM-30JSON
Osram Eco Classic Superstar B - Halogen Light BulbOSRAMHalogen27.938913.9278398.597991001.00n/an/aSPDTM-30JSON
ST-009 (warm white)STLED9.1995109.0303480.23671150.52-26.3 %✓SPDTM-30JSON
TK-A013 (daylight)TKLLED10.779674.5619472.7-36721160.92n/a✓SPDTM-30JSON
ST-012 (daylight)STLED11.81381116.6676382.020661130.53-23.3 %✓SPDTM-30JSON
Essential 11W (cool daylight)PhilipsLED10.31736168.1673184.412831040.54+38.9 %✓SPDTM-30JSON
ST-012 (warm white)STLED11.21220109.2303079.71711140.51-32.2 %✓SPDTM-30JSON
MyCare 9.5W (warm white)PhilipsLED8.81450165.0298583.710861090.56n/an/aSPDTM-30JSON
BULB NEW GLOSS (daylight)LAMPTANLED9.31548166.6668082.4-3861070.59+56.3 %n/aSPDTM-30JSON
MyCare 9.5W (cool white)PhilipsLED8.81682190.3404983.910831090.57+60.2 %n/aSPDTM-30JSON

Spectral power distribution

Each spectrum normalized to its peak. Click a legend entry to hide a lamp.

TM-30 color vector graphics

The colored line is the lamp's gamut across 16 hue bins; the gray circle is the reference illuminant. Arrows point where the lamp shifts each hue: outward means oversaturated, inward means desaturated. Rf is fidelity, Rg is gamut (100 = reference).

TK-A013 (warmlight)

Rf 72Rg 120CCT 2971 KDuv 0.0026

CRI R1–R15

64
1
79
2
92
3
64
4
63
5
71
6
77
7
40
8
-42
9
52
10
57
11
42
12
67
13
95
14
57
15

BULB DIMMER 9W (warm white)

Rf 89Rg 108CCT 3084 KDuv 0.0006

CRI R1–R15

82
1
92
2
96
3
82
4
83
5
91
6
83
7
60
8
10
9
82
10
82
11
72
12
85
13
99
14
75
15

Osram Eco Classic Superstar B - Halogen Light Bulb

Rf 99Rg 100CCT 2783 KDuv 0.0026

CRI R1–R15

99
1
99
2
99
3
97
4
99
5
99
6
98
7
98
8
97
9
98
10
97
11
97
12
99
13
99
14
98
15

ST-009 (warm white)

Rf 67Rg 115CCT 3034 KDuv -0.0011

CRI R1–R15

79
1
86
2
92
3
81
4
79
5
82
6
83
7
59
8
3
9
67
10
80
11
60
12
81
13
95
14
72
15

TK-A013 (daylight)

Rf 72Rg 116CCT 6194 KDuv 0.0074

CRI R1–R15

69
1
76
2
82
3
74
4
71
5
70
6
82
7
58
8
-36
9
44
10
71
11
49
12
70
13
90
14
63
15

ST-012 (daylight)

Rf 66Rg 113CCT 6763 KDuv 0.0062

CRI R1–R15

83
1
83
2
82
3
84
4
83
5
78
6
88
7
76
8
20
9
59
10
83
11
54
12
82
13
90
14
79
15

Reading the numbers

Every value on this page is measured in our integrating sphere. Here is what each metric means and why it matters.

Power (W)
Electrical input power, measured at the mains rather than read off the box. Lower is cheaper to run.
Luminous flux (lm)
Total visible light the lamp emits, in lumens. This, not watts, says how bright a lamp is.
Efficacy (lm/W)
Lumens per watt of input power. Good household LEDs reach 80 to 150 lm/W; halogen manages about 15 lm/W.
CCT (K)
Correlated color temperature: the shade of white, in kelvin. Around 2700 K is warm white like an incandescent bulb, 4000 K is neutral, 5000 K and above is cool, daylight-like white. Higher kelvin means a colder look.
CRI Ra
Color rendering index: how faithfully colors appear under the lamp compared with incandescent light or daylight, averaged over 8 standard color samples. 100 is perfect, above 90 is very good, below 80 looks visibly off.
R9
The CRI sample for saturated red, quoted separately because many LEDs score a high Ra while rendering red poorly. It matters for skin tones, food, and wood. Above 50 is decent, above 90 excellent.
TM-30 Rf
Fidelity index from the newer IES TM-30 method: like Ra, but averaged over 99 color samples, which makes it much harder to game. 100 is perfect.
TM-30 Rg
Gamut index: whether the lamp saturates or mutes colors overall. 100 matches the reference; above 100 makes colors pop, below 100 washes them out. The color vector graphics below show which hues shift.
Power factor (PF)
How cleanly the lamp draws current from the mains. 1.0 is ideal; low values load the wiring with reactive current, a common cost cut in cheap drivers.
SPD
Spectral power distribution: how much light the lamp emits at each wavelength. The shape of the curve reveals the technology, the phosphor mix, and any infrared content.
Flux and CCT vs claim
Measured value against the packaging claim. A check mark means the lamp is within tolerance (10 % for flux, 5 % for CCT, in line with EU Ecodesign and ANSI binning); larger deviations are printed outright.