Light Up


Translate this site.

Light Up (Akari) is a logic puzzle with simple rules and challenging solutions.

The rules are simple.Light Up is played on a rectangular grid. The grid has both black cells and white cells in it. The objective is to place light bulbs on the grid so that every white square is lit. A cell is illuminated by a light bulb if they're in the same row or column, and if there are no black cells between them. Also, no light bulb may illuminate another light bulb.
Some of the black cells have numbers in them. A number in a black cell indicates how many light bulbs share an edge with that cell.
Left click a square to place a light bulb. Right click to mark with X.

Video Tutorial
Hide the rules

Share

Light Up


7x7 Easy Light Up | 7x7 Normal Light Up | 7x7 Hard Light Up | 10x10 Easy Light Up | 10x10 Normal Light Up | 10x10 Hard Light Up | 14x14 Easy Light Up | 14x14 Normal Light Up | 14x14 Hard Light Up | 25x25 Easy Light Up | 25x25 Normal Light Up | 25x25 Hard Light Up

This Month
1. Asitukl
20
00:02.28
2. gtkrouwel
128
00:02.31
3. sway85
21
00:02.54
4. daklqw
31
00:02.63
5. kennethaw88
152
00:02.81
6. Wangxuye 00:02.93
7. Truth-or-Peace
124
00:03.03
8. Emgold 00:03.16
8. Altrik 00:03.16
10. XiaoXin1113
26
00:03.43
11. Thrillhou 00:03.49
12. Jack Choi
8
00:03.56
12. niqnna
18
00:03.56
14. noxcallis 00:03.58
15. Tmoney69 00:03.60
16. Piroska9
67
00:03.71
17. Hwellyn
74
00:03.73
18. goodman15
17
00:03.81
18. PacificDriver 00:03.81
20. Freakazoyd
77
00:03.89
This Week
1. sway85
21
00:02.54
2. kennethaw88
152
00:02.81
3. Truth-or-Peace
124
00:03.03
4. XiaoXin1113
26
00:03.43
5. Tmoney69 00:03.60
6. Piroska9
67
00:03.72
7. Hwellyn
74
00:03.73
8. Thrillhou 00:03.92
9. niqnna
18
00:04.03
10. Fjznbeinfnn 00:04.04
11. Creall
1
00:04.22
12. TheToaphster 00:04.74
13. KarasuKarasu 00:04.88
14. TheSunBro
60
00:04.90
15. huskyyy 00:05.19
16. Froerto3301
8
00:05.41
17. tonyjo4312
25
00:05.45
18. Educated-cat
30
00:05.89
19. LSQUAREDMATH
29
00:06.72
20. Goochelaar
106
00:06.85
Today
1. kennethaw88
152
00:02.81
2. Piroska9
67
00:03.72
3. TheSunBro
60
00:04.90
4. Froerto3301
8
00:05.41
5. LSQUAREDMATH
29
00:07.31
6. rone_r1
4
00:18.54
7. novaee 00:37.64
8.--- empty -----:--
9.--- empty -----:--
10.--- empty -----:--
11.--- empty -----:--
12.--- empty -----:--
13.--- empty -----:--
14.--- empty -----:--
15.--- empty -----:--
16.--- empty -----:--
17.--- empty -----:--
18.--- empty -----:--
19.--- empty -----:--
20.--- empty -----:--
MO3
1. jaybrainer
241
00:01.82
2. numbrr
301
00:02.18
3. vowels
216
00:02.19
4. Arok
113
00:02.20
5. sfumato
166
00:02.50
5. mtanzer
140
00:02.50
7. BingBongBob
108
00:02.53
8. qqwref
260
00:02.55
9. SkyBean1201
108
00:02.59
10. dkxxznxxx
32
00:02.61
AO5
1. jaybrainer
241
00:01.97
2. numbrr
301
00:02.28
3. vowels
216
00:02.33
4. Arok
113
00:02.36
5. Douglas Shamlin Jr.
713
00:02.58
6. sfumato
166
00:02.59
7. SkyBean1201
108
00:02.61
8. mtanzer
140
00:02.63
9. sauceguardian
101
00:02.67
10. boru
108
00:02.68
AO12
1. jaybrainer
241
00:02.49
2. numbrr
301
00:02.60
3. vowels
216
00:02.67
4. Arok
113
00:02.90
5. sfumato
166
00:02.98
6. Douglas Shamlin Jr.
713
00:03.00
7. mtanzer
140
00:03.09
8. sauceguardian
101
00:03.18
9. TashiroMiraki
217
00:03.27
10. qqwref
260
00:03.28
Robots / programmatic solversinfo  
1.tlstyer
130
00:00.006
2.cheyette00:00.109
3.hum@b0t
91
00:00.158

* MO3 - Mean of 3. The average of 3 consecutive times.
AO5 - Average of 5. The average of 5 consecutive times ignoring the highest and the lowest.
AO12 - Average of 12. The average of 12 consecutive times ignoring the highest and the lowest.
You need to be logged in to track your averages


Find your position in

Enter screen name:


More Logic Puzzles:  hideshow

2025-10-20 12:27:40

www.puzzle-light-up.com
Remove Ads | Report This Ad