heh, I bet you are super close and just can’t the beam in and out of the little room on the right. You can get either the bulb at the top or the one in the room as the last one but not both. You will indeed kick yourself when you get it.
Gah. Any help for level 8?
I’m up to 23, I’ll probably be awake all night until I solve up to 25. I don’t see a quick solution to 23 yet, but I’m distracted by football. Some passwords for you below.
22 - rambus
23 - acpi
Crrraaaapppp.
Okay, level 17. For some reason I could do this yesterday but I can’t today, even with the hints.
I have the beam leaving the little room. I used the refractor and 2 mirrors to do that. But I can’t get the other beam from the splitter up to the bulb to the lower right of the damn laser without blocking the beam. What the heck am I doing wrong?
Tibs.
Jesus. I swear. I post and then it comes to me. Never-fookin-mind. 
Tibs.
How much help?
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Bulb,bulb,reflector,splitter,spliter,splitter. The splitters don’t actually need to be splitters. It could be done with just mirrors. i.e. you only use one beam from each splitter. email me if you want a screenshot.
Yeah, I’m incredibly frustrated. I can get all but one.
OK, I’ve gotten level 24, and of course level 25 pops up. I look at it for a few minutes and realize that there are two many options for me to solve this in any reasonable time. I’m actually quitting and going to bed, would you believe.
Grr. Arrgh.
So I can get every one but the lightbulb in the second column over to go off. Halp?
It’s mirror, refractor, splitter in the space between the columns… what then?
The upper-right blub HAS to be the last one lit. Right?
RIGHT? GAH!
Perhaps I am thick.
But I can’t get the up left one lit. ARRGH!
On the left beam of the splitter I’ve got a total of four mirrors bouncing stuff, and the beam ends up hitting the bulb that’s the first on the right and then hitting the top bulb. I can’t figure out how to get the left one…
Level 17 Spoiler!
Laser is in corner x,y = 1,1. Beam goes direct from laser to splitter at 9,9, passing through the center of a double mirror at 6,6.
Right arm of splitter goes diagonally into enclosure containing the rightmost bulb, hitting refractor at 13,5, which deflects the beam directly rightward. Mirrors at 14,5 and 14,6 reflect beam through bulb at 13,6, and onto double mirror placed at 6,6. Double mirror reflects beam up to bulb at 6,1, and off screen.
Left arm of splitter at 9,9 goes to mirror placed horizontally at 8,10 (don’t set this mirror until later mirrors are set up, or you’ll hit the bomb). Beam reflects to a vertically placed mirror at 7,9, and reflects off another vertically placed mirror at 9,7, to light the bulb at 4,2. The remaining mirror is placed at 3,1 to reflect the light onto the bulb at 1,3.
Level 11 Spoiler!
Laser is at coordinate x,y=1,1 in lower left, with beam shooting up. Mirror at 1,6 to reflect beam to the right through the bulb at 2,6. Refractor at 3,6, deflecting beam diagonally upward through the gap in the leftmost wall. Mirror placed horizontally at 5,7, reflecting beam through bulbs at 6,7 and 9,4 to splitter at 11,2.
Left beam of splitter to horizontal mirror at 10,1, reflecting beam through bulbs at 9,2, 6,5 and 2,9.
Right beam of splitter goes through bulb at 13,4. Vertical mirror at 14,5 to reflect beam through bulb at 13,6.
YESSSSSSSS!
I got them all! The world of lasers are mine!!!
bump
Sorry for the bump, but level 18 is driving me nuts (I have only one bulb left to light). Hints anyone?
Got it (18).
On to 19.
So whats the trick to 23?
Wow, you guys sure are persistent. I gave up on this game days ago. That’s my motto: If its too hard, quit instead.
I keep taking a poke at 18 every now and then but so far no luck. I’m sure I’ll be at it all weekend when I can power sit.
Hrm… On level 16 I didn’t use the double mirror as anything but a mirror. On 17 I didn’t use one of my mirrors at all. What gives? Has anybody else had this happen to them?
Tenebras