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
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

New Puzzle
This Month
1. gt83
141
00:45.06
2. Oryn
192
00:57.16
3. tt1029
138
00:59.28
4. DarkChamp 01:00.00
5. Hachiman 01:02.74
6. Yeti
143
01:06.12
7. KongeBob 01:12.04
8. zenzaburo 01:12.60
9. xxbh02jf 01:16.07
10. highprime
155
01:18.71
11. ojyojyojy
58
01:25.45
12. Jananana
61
01:25.82
13. mmmmtra
37
01:26.55
14. baimouren
98
01:26.81
15. erichiro 01:28.06
16. Hesper
95
01:28.59
17. durugyakos 01:30.43
18. bsk5941
109
01:38.08
19. wldnekz1 01:39.83
20. nbapip 01:40.95
This Week
1. tt1029
138
01:04.57
2. Yeti
143
01:06.12
3. zenzaburo 01:14.07
4. KongeBob 01:20.84
5. ojyojyojy
58
01:25.45
6. Hesper
95
01:28.59
7. highprime
155
01:28.78
8. Jananana
61
01:35.16
9. nbapip 01:40.95
10. xiang10231
22
01:46.11
11. Limax 01:50.34
12. ksbkdksgsg 01:51.11
13. Ketone1121
30
01:53.95
14. amdo1 01:55.62
15. tonyjo4312
43
01:57.03
16. Wenmylii
11
01:59.71
17. bsk5941
109
02:09.36
18. Tjips
85
02:19.73
19. takaz 02:21.98
20. zdz
100
02:23.43
Today
1. Yeti
143
01:06.12
2. tt1029
138
01:20.80
3. Hagcray 12:11.70
4.--- empty -----:--
5.--- empty -----:--
6.--- empty -----:--
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
325
00:50.09
2. TashiroMiraki
233
00:51.08
3. gt83
141
00:53.56
4. 강일출
186
01:02.56
5. Mark M.
117
01:02.66
6. sfumato
168
01:02.97
7. Yeti
143
01:04.76
8. Moooon
135
01:06.76
9. Thomas Garner
180
01:07.35
10. mtanzer
140
01:08.67
AO5
1. numbrr
325
00:53.75
2. TashiroMiraki
233
00:53.76
3. gt83
141
00:57.45
4. Mark M.
117
01:05.59
5. 강일출
186
01:07.85
6. Yeti
143
01:08.42
7. mtanzer
140
01:09.99
8. Thomas Garner
180
01:11.20
9. Moooon
135
01:14.07
10. Klunk
24
01:15.24
AO12
1. numbrr
325
01:02.65
2. gt83
141
01:03.90
3. TashiroMiraki
233
01:11.46
4. Yeti
143
01:16.88
5. Thomas Garner
180
01:23.14
6. 강일출
186
01:24.51
7. Mark M.
117
01:25.52
8. mtanzer
140
01:26.99
9. Moooon
135
01:28.65
10. dxjonas
164
01:29.41
Robots / programmatic solversinfo  
1.tlstyer
154
00:00.014
2.siebi
1
00:00.038
3.hum@b0t
91
00:00.169

* 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

New Puzzle

Find your position in

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