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. DarkChamp 00:42.74
2. tt1029
95
00:57.23
3. TomGuo
147
01:00.78
4. Hachiman 01:05.41
5. 飞飞
50
01:09.13
6. ykykpyk 01:13.36
7. Theck
28
01:14.20
8. COlDAiR
65
01:22.36
9. Billo93 01:22.47
10. LemonSherbet 01:22.99
11. KongeBob 01:31.69
12. Hashibrown 01:33.19
13. Freakazoyd
73
01:43.46
14. durugyakos 01:44.39
15. Kukko
130
01:44.75
16. DdBbon 01:47.60
17. Hesper
66
01:49.64
18. Polaris.
20
01:54.43
19. fimcg 01:56.62
20. dnfh1 01:57.03
This Week
1. tt1029
95
00:57.23
2. TomGuo
147
01:04.75
3. ykykpyk 01:13.36
4. durugyakos 01:50.49
5. Cerine 02:08.25
6. amdo1 02:11.70
7. Hesper
66
02:14.88
8. LesAM 02:31.80
9. HackMan
112
02:34.18
10. lilyoooo
24
02:35.37
11. hiptopoker 02:43.73
12. Kelizo
22
02:47.79
13. bozyslaw67
64
02:51.22
14. Pythagoraswitch 02:52.64
15. HocusMucus
76
02:55.99
16. CrlD
116
03:04.45
17. Gigiw
55
03:07.02
18. cryptOakmont 03:22.00
19. biancashing 03:48.33
20. AzuReVaPouR 03:51.39
Today
1. tt1029
95
01:23.26
2. hiptopoker 02:58.50
3. Kelizo
22
03:02.04
4. CrlD
116
03:04.45
5. Gigiw
55
04:09.58
6. acedertoice
18
06:37.73
7.--- empty -----:--
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. numbrr
298
00:50.09
2. TashiroMiraki
216
00:51.08
3. 강일출
169
01:02.56
4. Mark M.
112
01:02.66
5. sfumato
166
01:02.97
6. gtkrouwel
120
01:05.10
7. mtanzer
140
01:08.67
8. Thomas Garner
165
01:10.08
9. dxjonas
131
01:13.39
10. Klunk
24
01:14.19
AO5
1. numbrr
298
00:53.75
2. TashiroMiraki
216
00:53.76
3. Mark M.
112
01:05.59
4. 강일출
169
01:07.85
5. gtkrouwel
120
01:08.46
6. mtanzer
140
01:09.99
7. Thomas Garner
165
01:12.16
8. Klunk
24
01:15.24
9. dxjonas
131
01:16.00
10. summernight
213
01:17.11
AO12
1. numbrr
298
01:10.81
2. TashiroMiraki
216
01:11.46
3. gtkrouwel
120
01:14.83
4. Thomas Garner
165
01:23.14
5. 강일출
169
01:24.51
6. Mark M.
112
01:25.52
7. mtanzer
140
01:26.99
8. dxjonas
131
01:29.41
9. Moooon
114
01:34.35
10. Yeti
117
01:34.48
Robots / programmatic solversinfo  
1.tlstyer
126
00:00.014
2.hum@b0t
91
00:00.169
3.preciousmouse
71
00:01.075

* 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

2025-08-18 14:27:41

www.puzzle-light-up.com
Remove Ads