Light Year

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Light Year is one of the tabs in Galaxy Idle Clicker. It's being used to perform Tier 1 Prestige - Travel Back in Time and spend Light Years for various upgrades.

There are 3 available tabs in Light Years tab: Time Travel, Upgrades and Statistics.

Time Travel Tab

Light Years Math explained by the Dev

On the Time Travel you can see current Run Light Years gain, Next Black Hole progress and current multipliers.

Light Years Calculation

Your Light Years gain from the Current Run is being calculated from the multiple progression metrics from your current run:

• Planets Completed
• Levels Gained
• Upgrades
• Enemies Killed
• Army Created

And then sum of gained Light Years is multiplied by the Time you spent in the current run. Although Time Bonus isn't linear. The longer you stay in the current run, the lower multiplier gain you will get.

Important Note. The Time factor changes after you reach Black Hole #11, and permanently after Supernova #1. After that point, the Time Bonus IS Linear up to the 24X Bonus. Reducing the effect of 3 hour runs, but improving the time ratio for runs that go beyond 5 hours.

GIC Light Years Time Bonus Efficiency Graph

Light Year Time Bonus Multiplier (Before BH #11)

Time Bonus Multiplier	Time Frame	Total Run Time
5x	0h-3h	3 hours
8x	3h-7h	10 hours
10x	10h-12h	12 hours
15x	12h-20h	20 hours
20x	20h-24h	24 hours

Light Years Multipliers

On the top of the Time Travel screen, you can see the Multipliers Gains that are awarded for Light Years from Time Travels Gained this run.

By default, you will get only Damage and Health Multipliers, but as you get more Light Years you will be able to unlock more stuff.

Light Years Multipliers

Multiplier	Light Years to Unlock
Damage	0
HP	0
Junk	3.5K
Plasma	6K
Exp	10K
Prisoners	15K
Citizen	22.5K
Garbage	100K
Energy	5M
Meteorite	500M
Minerals	710M
Radiations	1B
?	2T

Travel Back in Time

Travel Back in Time button will perform Tier 1 Prestige for your current run. By prestiging you will get Light Years depending on your current progress and reset most of the progression systems in the game.

What gets reset on the Light Year Travel Back in Time Prestige:

• Junk and Plasma Stored and Upgrades
• Skill Points and level
• Prisoners and Citizens and their Upgrades
• Universe progression (Galaxies, Solar Systems, Planets and Areas)

Light Years Upgrades

After you perform Travel Back in Time you can spend your Light Years to purchase the upgrades. The path here is pretty linear, since you will need to unlock previous upgrades to get access to the new ones.

Light Year Upgrades

Upgrade	Light Year Cost	Unlock Requirement	Notes
Unlock Auto Buy Junk/Plasma Tab	100	Perform Travel Back in Time
Unlock Auto Progression	300	Buy Auto Buy/Junk Plasma Tab	You can automatically move to the next Area when current one is cleared
Unlock Skip Play Planet Defense		Buy Auto Buy/Junk Plasma Tab	You can Skip Planet Defense and claim 25% of your highest score instantly without playing the minigame
Increment Base Stats	5 Levels, 300 per level	Black Hole 1	Additional Attack and HP stats
Decrease enemy Shield	5 levels, 480 per level	Max out Incremental Base Stats↑	Shielded enemies will have 1 less shield HP per level
Increment Base Stats (Damage and HP) by 0.1	5 levels, 300 per level	Max out Decrease enemy Shield ↑	You will have higher base stats
Increase Junk/Plasma/Exp current Bonus: 2.5x	1500	Max out Row #2	You will have higher base stats
Increment Base Stats	5 levels, 480 per level	Black Hole 2	Additional Attack and HP stats
Decrease enemy Shield	5 levels, 300 per level	Max out Incremental Base Stats↑	Shielded enemies will have 1 less shield HP per level
Unlock Auto Buy 1st/2nd/3rd Race Citizens Tab	1000	Max out Decrease enemy Shield↑	You can automate Citizen upgrades
Decrement Army Conversion Requirements	5 levels, 750 per level	Black Hole 3	Armies will be 5% cheaper to recruit per level
Increment Base Stats	5 levels, 750 per level	Max out Decrement Army Conversion Requirements↑	Additional Attack and HP stats
Decrease Prisoners Pity	10 levels, 375 per level	Max out Incremental Base Stats↑	Prisoner Pity is lowered by 5 each level
Increase Damage/Hp	3750	Max Out Decrease Prisoners Pity	Increase Damage and HP based on the Light Years Points gained since the start of the Supernova Collapse
Decrement Army Conversion Requirements	5 levels, 1500 per level	Black Hole 4	Armies will be 5% cheaper to recruit per level
Increase Items Drop Chance	5 levels, 1500 per level	Max Out Decrement Army Conversion Requirements	Increase Items Drop Chance by 0.05% per level
Increment Base Stats	5 levels, 1500 per level	Max out Increase Items Drop Chance	Additional Attack and HP stats
Increase Prisoners/Citizens/Garbade	7500	Max Out Increment Base Stats	Increase Prisoners/Citizens/Garbage based on the Light Years Points gained since the start of the Supernova Collapse

When all the Light Year upgrades are done Infinite LY upgrade tab gets unlocked.

Infinite Light Years Upgrades

Infinite LY upgrades are available after finishing up Light Year upgrades and they will not reset on Black Hole Travel Prestige. However, they will reset on Supernova Collapse.

Most of the Light Year Infinite Upgrades will unlock as you progress through the Black Holes.

Once you get access to the Light Year Infinite Tab you can decide how to spread available light years. It's usually up to a personal preference, but make sure that you get Special Upgrades when you can afford them.

Infinite Light Year Permanent Upgrades

Upgrade	Light Year Cost	Unlock Requirement	Notes
Damage Multiplier	Starts at 99.01	Finish all the Light year Upgrades	Permanent damage multiplier
HP Multiplier	Starts at 198.02	Finish all the Light year Upgrades	Permanent HP multiplier
Increase Junk Earned	Starts at 396.04	BH #5?	Permanent Junk multiplier
Multiply Exp Earned		BH #6	Permanent Exp multiplier
Multiply Plasma Earned		BH #7	Permanent Plasma multiplier
Multiply Citizens Generation	Starts at 4950.5	BH #8	Multiply the quantity of Citizens Generated
Multiply Energy earned		Reach Normal Difficulty	Multiply the amount of Energy earned from enemies
Multiply Prisoners saved		BH #9	Multiply the amount of Prisoners saved from enemies
Multiply Garbage Production		BH #10	Multiply Garbage Production for all slots
Multiply Meteorite earned	Starts at 1M/1e6	BH #12	Multiply the amount of Meteorites gathered by destroying Meteors (by 5% per level)
Multiply Radiations earned	Starts at 2M/2e6	BH #13	Multiply the amount of Radiations gathered by blocking Radiations (by 5% per level)
Multiply Minerals earned	Starts at 5M/5e6	BH #14	Multiply the amount of Minerals gathered by destroying Stones (by 5% per level)

Special Upgrades

Infinite Light Year Special Upgrades

Upgrade	Light Year Cost	Unlock Requirement	Notes
Increase Item Drop chance	lvl1:2000 lvl2:50K/5e4 lvl3:250K/2.50e5 lvl4:1M/1.00e6 lvl5:2.5M/2.50e6	BH #5?	Increases item drop chance by 0.05% per level
Unlock Garbage Production #2		BH #6
Increase Mech Upgrade Drop Chance by 2%	lvl1:50K/5e4 lvl2:250K/2.50e5 lvl3:1M/1.00e6 lvl4:2.5M/2.50e6 lvl5:5M/5e6 lvl6:15M/1.5e7	BH #6	Decreases the enemies required to drop a mech upgrade by 2% per level
Increase Passive Shield HP	lvl1:100K/1.00e5 lvl2:300K/3.00e5 lvl3:900K/9.00e5 lvl4:2.7M/2.7e6 lvl5:8.10M/8.10e6	BH #7	Permanently Increase Passive Shield HP by 10 per level
Reduce Death/Progression time by 1 second	1M/1.00e6	BH #8	Reduce Death/Progression time by 1 second
Multiply Light Years earned (by 5% per level)	Starts at 666.67K/6.67e5	BH #11	∞ Levels
Delays Meteorite Impact by 10 seconds (50 levels)	Starts at 1M/1e6	Reach Hard difficulty	Delays Meteorite impact by 10 sec per level. Each time you travel to a new Star System, the impact time is reduced by 10 seconds.
Unlock a new Garbage Production	1B/1e9	Reach Supernova #1	Unlocks the 8th Garbage Production slot
Coming Soon	?	Reach Supernova #3	?
?	?	Gather 1T/1e12 Light Years	?
?	?	Reach Hell Difficulty in Supernova #4	?
Coming Soon	?	?	?

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