I'll do my best.
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M6:
Cell configuration: 6x3.7V RCR123 size protected AW brand Li-Ion cells.
Bulb Options:
MN60: 18W, 455 - 275 lumen in 41 minutes (bulb life reduced dramatically, but incredible)
LF HO-M6R: 23W, 480 - 285 lumen in 30 minutes (best drop-in solution available for this config)
EDIT IN:
if you can get ahold of a 3x17670 adapter from fivemega, you can run the same bulbs listed above. (same notes apply).
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M3:
Cell configuration: 2x3.7V 17500 size protected Li-Ion cells. (AW, Pila, or Wolf-Eyes)
Bulb Option:
SF MN10: 9.5W, 151 - 94 lumen in 52 minutes
LF HO-M3: 12W, 238 - 145 lumen in 40 minutes
LF EO-M3: 15.5W, 268 - 162 lumen in 30 minutes
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M3+ 1 cell extender:
Cell configuration: 2x3.7V 17670 size protected Li-Ion cells. (AW, Pila, or Wolf-Eyes)
Bulb Option:
MN10: 9.5W, 154 - 100 lumen in 74 minutes
MN11: 20W, 330 - 175 lumen in 31 minutes
LF HO-M3: 12W, 241 - 155 lumen in 57 minutes
LF EO-M3: 15.5W, 273 - 172 lumen in 44 minutes
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C3:
Cell configuration: 2x3.7V 17500 size protected Li-Ion cells. (AW, Pila, or Wolf-Eyes)
Bulb Options:
LF D26 ES-9: 7W, 115 - 75 lumen in 73 minutes
LF D26 SR-9: 9W, 160 - 100 lumen in 51 minutes
LF D26 HO-9: 12W, 215 - 132 lumen in 40 minutes
LF D26 EO-9: 15W, 268 - 162 lumen in 30 minutes
SF P90: 9W, 151 - 94 lumen in 52 minutes
G&P G90: 9W, 151 - 94 lumen in 52 minutes
G&P D26 7.4V "DX 10W xenon": 9W, 153 - 95 lumen in 52 minutes (guess)
G&P D26 7.4V "DX 15W xenon": 10.5W, 175 - 108 lumen in 46 minutes (guess)
Pathfinder P90: 10W, 165 - 102 lumen in 47 minutes
WE D26 9V: 10W, 175 - 108 lumen in 46 minutes
Pila GL3 LA: 10W, 175 - 108 lumen in 46 minutes
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C3 + 1 CELL EXTENDER
Cell configuration: 2x3.7V 17670 size protected Li-Ion cells. (AW, Pila, or Wolf-Eyes)
Bulb Options:
LF D26 ES-9: 7W, 116 - 76 lumen in 105 minutes
LF D26 SR-9: 10W, 163 - 106 lumen in 73 minutes
LF D26 HO-9: 12W, 218 - 140 lumen in 57 minutes
LF D26 EO-9: 15.5W, 273 - 172 lumen in 44 minutes
SF P90: 9.5W, 154 - 100 lumen in 74 minutes
SF P91: 20W, 330 - 175 lumen in 31 minutes
G&P G90: 9.5W, 154 - 100 lumen in 74 minutes
G&P D26 7.4V "DX 10W xenon": 10W, 158 - 102 lumen in 74 minutes (guess)
G&P D26 7.4V "DX 15W xenon": 11W, 179 - 115 lumen in 66 minutes (guess)
Pathfinder P90: 10.5W, 167 - 107 lumen in 67 minutes
WE D26 9V: 10.5W, 179 - 115 lumen in 66 minutes
Pila GL3 LA: 10.5W, 179 - 115 lumen in 66 minutes
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C2:
Cell configuration: 2x3.7V RCR123 size protected AW brand Li-Ion cells.
Bulb Options:
LF D26 ES-9: 7W, 98 - 56 lumen in 38 minutes
LF D26 SR-9: 9W, 126 - 74 lumen in 25 minutes
LF D26 HO-9: 12W, 160 - 88 lumen in 20 minutes
SF P90: 9W, 118 - 70 lumen in 25 minutes
G&P G90: 9W, 118 - 70 lumen in 25 minutes
G&P D26 7.4V "DX 10W xenon": 9W, 118 - 70 lumen in 25 minutes
G&P D26 7.4V "DX 15W xenon": 10.5W, 136 - 80 lumen in 23 minutes
Pathfinder P90: 10W, 129 - 75 lumen in 23 minutes
WE D26 9V: 10W, 136 - 80 lumen in 23 minutes
Pila GL3 LA: 10W, 136 - 80 lumen in 23 minutes
OR
Cell configuration: 1x3.7V 17670 size protected Li-Ion cells. (AW, Pila, or Wolf-Eyes)
Bulb Options:
LF D26 HO-4: 7W, 106 - 69 lumen in 49 minutes
G&P D26 3.7V: 8W, 118 - 72 lumen in 40 minutes
WE D26 3.7V: 8W, 114 - 69 lumen in 42 minutes
LF D26 EO-4: 9W, 122 - 70 lumen in 37 minutes
G&P D26 3.7V "DX 10W xenon": 7W, 118 - 72 lumen in 40 minutes
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C2 plus 1 cell extender (same options as C3 above)
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U2:
A single 3.7V 17670 size protected or unprotected Li-Ion should fit and work fine. Older models had room for an 18650, some had a sleeve that could be removed to make room for 18650s.
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E2D: (I think options should be the same as a E2E... which are:..)
cell configuration 1x3.7V 17670 size protected Li-Ion cell. (AW, Pila, or Wolf-Eyes)
Bulb Options:
LF HO-E1R: 3W, 46- 30 lumen in 112 minutes
LF EO-E1R: 4.5W, 76 - 49 lumen in 69 minutes
OR
cell configuration 2x3.7V RCR123 size protected AW brand Li-Ion cells.
Bulb Options:
LF HO-E2R: 5W, 90 - 52 lumen in 47 minutes
LF EO-E2R: 6W, 117 - 67 lumen in 38 minutes
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E1E:
cell configuration 1x3.7V RCR123 size protected AW brand Li-Ion cells.
Bulb Options:
LF HO-E1R: 3W, 39 - 23 lumen in 38 minutes
LF EO-E1R: 4.5W, 59 - 35 lumen in 23 minutes
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E1L:
Probably best bet is a 3.0V RCR123 size LiFeP04 cell (will require special charger).
I think some people run 3.7V cells in these, but I think it might be hard on them... I'm not 100% sure about this light, get second opinion.
Expect about 1/3rd the runtime compared to primary cells with a LiFeP04 cell.
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L4: Sorry, I don't know.
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G2L: Either 1x3.7V 17670 size Li-Ion cell, which will have a long runtime with diminishing output through the duration of the run,
or 2x3.7V RCR123 size cells, which will deliver about half the regulated runtime of a pair of primary lithium cells, but no trailing diminishing output, output will remain full brightness through the duration of the run then suddenly die if you drain it far enough to trip protection (try not to).
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G2: Same as C2 above.
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Kroma: Sorry, no idea, 2x 3.0V RCR123 size LiFeP04 cells would be my best guess, expect 1/3rd the normal runtime. get second opinion
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That covers everything I can think of and copy/paste from the compatibility charts in the guide (link in sig line)
Eric