Incandescent Bulb Test

Our circuit consists of two 30V DC adjustable power supplies connected in series with an 100W incandescent bulb.

0V0A70°F Room temp

5v0.182a70°F Room Temp

For this test we applied DC in 1V steps and measured current and temperature

10V0.237A71°F

15V0.269A86°F

As voltage and current goes up Filament beginning to glow slight red, red glow growing in intensity, red glow eventually turning to a orange glow…

20V0.299A95°F

25V0.328A112°F

Filament between internal posts fully lit showing an orange color. The bulb is physically hot, but no real light being emitted.

30V0.354A125°F

35V0.381A128°F

orange glow of filament turning to more white light

40V0.406A132°F

45V0.430A151°F

As voltage is increased a fair amount of white light being emitted. High amount of light being emitted at 45V.

50V0.453V148°F

55V0.475A157°F

Now the light being emitted is strong enough to hurt eyes without sunglass protection.

60V0.497A158°F

Bulb to hot to touch at our maximum applied voltage of 60VDC

Extra-Rare: 125F (52C)Rare: 135F (57C)Medium-Rare: 145F (63C)Medium: 160F (71C)Well-Done: 170F (77C)

Notice how high the temperatures is. For comparison, here are the internal temperatures recommended for cooking a steak:

0 10 20 30 40 50 60 700

20

40

60

80

100

120

140

160

180

Temp(°F)

Linear (Temp(°F))

Voltage

Temeratu

re(°F)

0 10 20 30 40 50 60 700

100

200

300

400

500

600

Volt

Linear (Volt)

Amps(mA)

Linear (Amps(mA))

VoltageC

urr

en

t(m

A)

This is our measured results for the experiment.