<s>
Lights	B-Application
Out	I-Application
is	O
an	O
electronic	O
game	O
released	O
by	O
Tiger	O
Electronics	O
in	O
1995	O
.	O
</s>
<s>
Tiger	O
Toys	O
also	O
produced	O
a	O
cartridge	O
version	O
of	O
Lights	B-Application
Out	I-Application
for	O
its	O
Game	B-Operating_System
com	I-Operating_System
handheld	B-Application
game	I-Application
console	I-Application
in	O
1997	O
,	O
shipped	O
free	O
with	O
the	O
console	O
.	O
</s>
<s>
A	O
number	O
of	O
new	O
puzzles	O
similar	O
to	O
Lights	B-Application
Out	I-Application
have	O
been	O
released	O
,	O
such	O
as	O
Lights	B-Application
Out	I-Application
2000	O
(	O
5×5	O
with	O
multiple	O
colors	O
)	O
,	O
Lights	B-Application
Out	I-Application
Cube	O
(	O
six	O
3×3	O
faces	O
with	O
effects	O
across	O
edges	O
)	O
,	O
and	O
Lights	B-Application
Out	I-Application
Deluxe	O
(	O
6×6	O
)	O
.	O
</s>
<s>
Lights	B-Application
Out	I-Application
was	O
created	O
by	O
a	O
group	O
of	O
people	O
including	O
Avi	O
Olti	O
,	O
Gyora	O
Benedek	O
,	O
Zvi	O
Herman	O
,	O
Revital	O
Bloomberg	O
,	O
Avi	O
Weiner	O
and	O
Michael	O
Ganor	O
.	O
</s>
<s>
The	O
5×5	O
grid	O
of	O
Lights	B-Application
Out	I-Application
can	O
be	O
represented	O
as	O
a	O
25x1	O
column	O
vector	O
with	O
a	O
1	O
and	O
0	O
signifying	O
a	O
light	O
in	O
its	O
on	O
and	O
off	O
state	O
respectively	O
.	O
</s>
<s>
"	O
Light	O
chasing	O
"	O
is	O
a	O
method	O
similar	O
to	O
Gaussian	B-Algorithm
elimination	I-Algorithm
which	O
always	O
solves	O
the	O
puzzle	O
(	O
if	O
a	O
solution	O
exists	O
)	O
,	O
although	O
with	O
the	O
possibility	O
of	O
many	O
redundant	O
steps	O
.	O
</s>
<s>
Tables	O
and	O
strategies	O
for	O
other	O
board	O
sizes	O
are	O
generated	O
by	O
playing	O
Lights	B-Application
Out	I-Application
with	O
a	O
blank	O
board	O
and	O
observing	O
the	O
result	O
of	O
bringing	O
a	O
particular	O
light	O
from	O
the	O
top	O
row	O
down	O
to	O
the	O
bottom	O
row	O
.	O
</s>
