Fallout 2 light levels

set_light_level is not a linear function and argument of 0 does not mean black screen. Here's a graph and a table to help to understand what it actually does.

Values table

Sfall's get_light_level returns more or less honest brightness - what your eyes see.
set_light_level is mostly linear, but it starts at 25% and has 2 huge jumps in the middle (49>50, 50>51).

set_light_level	get_light_level	get_light_level/65336
0	16384	25.000
1	16629	25.373
2	16875	25.749
3	17121	26.124
4	17367	26.499
5	17612	26.873
6	17858	27.249
7	18104	27.624
8	18350	27.999
9	18595	28.373
10	18841	28.749
11	19087	29.124
12	19333	29.499
13	19578	29.873
14	19824	30.249
15	20070	30.624
16	20316	30.999
17	20561	31.373
18	20807	31.748
19	21053	32.124
20	21299	32.499
21	21544	32.873
22	21790	33.248
23	22036	33.624
24	22282	33.999
25	22528	34.375
26	22773	34.748
27	23019	35.124
28	23265	35.499
29	23511	35.874
30	23756	36.248
31	24002	36.624
32	24248	36.999
33	24494	37.374
34	24739	37.748
35	24985	38.124
36	25231	38.499
37	25477	38.874
38	25722	39.248
39	25968	39.624
40	26214	39.999
41	26460	40.374
42	26705	40.748
43	26951	41.123
44	27197	41.499
45	27443	41.874
46	27688	42.248
47	27934	42.623
48	28180	42.999
49	28426	43.374
50	40960	62.500
51	53493	81.623
52	53739	81.999
53	53985	82.374
54	54231	82.749
55	54476	83.123
56	54722	83.499
57	54968	83.874
58	55214	84.249
59	55459	84.623
60	55705	84.999
61	55951	85.374
62	56197	85.749
63	56442	86.123
64	56688	86.499
65	56934	86.874
66	57180	87.249
67	57425	87.623
68	57671	87.998
69	57917	88.374
70	58163	88.749
71	58408	89.123
72	58654	89.498
73	58900	89.874
74	59146	90.249
75	59392	90.625
76	59637	90.998
77	59883	91.374
78	60129	91.749
79	60375	92.124
80	60620	92.498
81	60866	92.874
82	61112	93.249
83	61358	93.624
84	61603	93.998
85	61849	94.374
86	62095	94.749
87	62341	95.124
88	62586	95.498
89	62832	95.874
90	63078	96.249
91	63324	96.624
92	63569	96.998
93	63815	97.373
94	64061	97.749
95	64307	98.124
96	64552	98.498
97	64798	98.873
98	65044	99.249
99	65290	99.624
100	65536	100.000