diff --git a/tikz/2d-light-bulb/2d-light-bulb.png b/tikz/2d-light-bulb/2d-light-bulb.png
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Binary files /dev/null and b/tikz/2d-light-bulb/2d-light-bulb.png differ
diff --git a/tikz/2d-light-bulb/2d-light-bulb.tex b/tikz/2d-light-bulb/2d-light-bulb.tex
new file mode 100644
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+++ b/tikz/2d-light-bulb/2d-light-bulb.tex
@@ -0,0 +1,12 @@
+\documentclass[border=2pt]{standalone}
+
+\usepackage{pgfplots}
+\usepackage{tikz}
+\usepackage{xcolor}
+\usetikzlibrary{positioning}
+\usetikzlibrary{decorations.text}
+\usetikzlibrary{decorations.pathmorphing}
+
+\begin{document}
+\input{overfitting}
+\end{document}
diff --git a/tikz/2d-light-bulb/Makefile b/tikz/2d-light-bulb/Makefile
new file mode 100644
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--- /dev/null
+++ b/tikz/2d-light-bulb/Makefile
@@ -0,0 +1,33 @@
+SOURCE = 2d-light-bulb
+DELAY = 80
+DENSITY = 300
+WIDTH = 512
+
+make:
+	pdflatex $(SOURCE).tex -output-format=pdf
+	make clean
+
+clean:
+	rm -rf  $(TARGET) *.class *.html *.log *.aux *.data *.gnuplot
+
+gif:
+	pdfcrop $(SOURCE).pdf
+	convert -verbose -delay $(DELAY) -loop 0 -density $(DENSITY) $(SOURCE)-crop.pdf $(SOURCE).gif
+	make clean
+
+png:
+	make
+	make svg
+	inkscape $(SOURCE).svg -w $(WIDTH) --export-png=$(SOURCE).png
+
+transparentGif:
+	convert $(SOURCE).pdf -transparent white result.gif
+	make clean
+
+svg:
+	#inkscape $(SOURCE).pdf --export-plain-svg=$(SOURCE).svg
+	pdf2svg $(SOURCE).pdf $(SOURCE).svg
+	# Necessary, as pdf2svg does not always create valid svgs:
+	inkscape $(SOURCE).svg --export-width=$(WIDTH) --export-plain-svg=$(SOURCE)1.svg
+	rsvg-convert -a -w 720 -f svg $(SOURCE)1.svg -o $(SOURCE).svg
+	rm $(SOURCE)1.svg
diff --git a/tikz/2d-light-bulb/README.md b/tikz/2d-light-bulb/README.md
new file mode 100644
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--- /dev/null
+++ b/tikz/2d-light-bulb/README.md
@@ -0,0 +1,3 @@
+Compiled example
+----------------
+![Example](2d-light-bulb.png)
diff --git a/tikz/2d-light-bulb/overfitting.tex b/tikz/2d-light-bulb/overfitting.tex
new file mode 100644
index 0000000..2a08f17
--- /dev/null
+++ b/tikz/2d-light-bulb/overfitting.tex
@@ -0,0 +1,39 @@
+\definecolor{c1}{HTML}{0072B2}
+\definecolor{c2}{HTML}{009E73}
+\begin{tikzpicture}
+    \tikzstyle{training}=[c1, thick,samples=200,dashed]
+    \tikzstyle{testing}=[c2, thick,samples=200]
+    \begin{axis}[
+        legend pos=north east,
+        legend cell align=left,
+        axis x line=middle,
+        axis y line=middle,
+        grid = major,
+        width=14cm,
+        height=8cm,
+        grid style={dashed, gray!30},
+        xmin=5,       % start the diagram at this x-coordinate
+        xmax=100,    % end   the diagram at this x-coordinate
+        ymin=0,       % start the diagram at this y-coordinate
+        ymax=350,   % end   the diagram at this y-coordinate
+        axis background/.style={fill=white},
+        xlabel=Energy savings,
+        ylabel={Amortization time\\in h},
+        y label style={at={(-0.1,1.0)}},
+        tick align=outside,
+        minor tick num=-3,
+        tension=0.08]
+
+        \addplot[domain=5:100, red, solid, samples=200] {1.50 / (0.003 * x)};
+        \addplot[domain=5:100, green, dashed, samples=200] {3.00 / (0.003 * x)};
+        \addplot[domain=5:100, blue, dotted, samples=200] {5.00 / (0.003 * x)};
+
+      %\draw[dashed, very thick] (axis cs:50,0.0) -- (axis cs:50,0.3);
+      %\draw[decoration={text along path, text={overfitting}, text align={center}}, decorate] (axis cs:51,0.16) -- (axis cs:90,0.16);
+      %\draw[-{latex[scale=3.0]}, very thick] (axis cs:51,0.15) -- (axis cs:90,0.15);
+
+      \addlegendentry{1.50 EUR and 0.30 EUR/kWh}
+      \addlegendentry{3.00 EUR and 0.30 EUR/kWh}
+      \addlegendentry{5.00 EUR and 0.30 EUR/kWh}
+    \end{axis}
+\end{tikzpicture}