If "bright" is a minute, this ink is a calendar. Wanna have some fun? Write something out in Firefly, and then once it's dry point a black (UV) light at it.

This ink is far better than I had expected. It is bright and vivid on the paper even though it looks like it's watered down in the bottle. It flows nicely without smearing as well.

The perfect ink to go in the new LAMY Safari neon yellow.

I wanted a bold yellow, and this is it!

Just what i wanted. Suoer intense yellow color. A liitle hard to read at times but still good.

Nice novelty shade of ink. I like it.

Great and fun in a highlighter Kaweco pen!

I'm happy with the purchase. The color is more "classic highlighter yellow" than the color sample indicates. I like that, though. I had hoped to use a fountain pen as a highlighter, and this definitely gets the job done.

I bought this ink just because I need yellow ink for mixing. I did not have high expectations. But this ink shocked me when I tried it. It's fluorescent! I thought the yellow ink would be hard to see, but this one stands out. Very bright and good for highlighting.

Works great! I use it as a highlighter in my 3.8mm pilot parallel. It works as expected.

I was impressed by the care that went into packing my order. Thank you Goulet Pens! I'm not sure what I was expecting but was blown away by the colour of this ink. It practically glows. A is usual from Noodler, this is a very generously filled bottle of reliable ink.

It's a good yellow ink shows up well.

This is truly a nice, noticeable bright color! Great for highlighting corrections.

Excellent. Just what I hoped for.

a good ink...exactly what i expected... the yellow is pretty intense and prefect for the highlights and details i have planned for it...especially drawing fireflies (no less)...careful with usage as it will stain your fingers but washes of easily enough.

I use it with my pilot parallel and it's a great highlighter ink! Very fluorescent and wet. It works best on top of waterproof inks.

I bought a sample and used it in a broad nib fountain pen...when it ran out I had to get a bottle.

Used with the Preppy pen this ink has saved the purchase of and trashing many single use pens. The ink does everything you would want in highlighter pen. This is my second bottle. Great stuff.

A friend bought this for me in Early February and I was so excited! The amount of ink would have honestly lasted me more than a year but it didn't because the cap sucks. I have problem the cap on Noddlers bottles twice now and it's not because I'm clumsy. The first time it was in the box and it fell about a foot from my backpack and the second time my parents accidentally bumped it when it was on the counter. Both times the cap broke but I have had other ink bottles that the cap haven't broken so easily.. I lost my entire bottle of ink and it was easily a waste of $10. I'm disappointed but I love the ink so I will buy again but I'll be purchasing a separate container for it until they decide to change the cap.

You can never run out of ink as long as they keep making it! All you need to do is to refill your pen and it is ready to hi-light!! How easy it that? No more running to the office supply house for hi lighters!!! I just love it and so does my daughter as I bought one for her also!!

Bright, Translucent, Stays Put. Exactly what I wanted, and just as reliable as a disposable highlighter would be (but much-longer lasting). It's happily at home in my Platinum Preppy. It has smudged some ink if I don't have the foresight to let it dry, but that's personal error and no fault of the ink, & since I use it mostly on computer-printed documents, it's hardly an issue. I'm absolutely delighted.

Great wet saturated ink but it quickly fades on paper after passage of time.

I found thid color an awsome highlighting pen color and I love that I can refill with it. The only problem is that it goes right through the page.

I am so happy that I no longer have to throw more plastic into the dump! I use in the Platinum pen!

Noodler's Firefly is everything I was looking for in a highlighter ink. Flows nicely and very bright. I have not tested the water resistance so I left that portion as moderate as there is no other option (e.g., N/A). I plan on getting the 4.5 oz bottle along with a TSBY inkwell to use the Firefly ink with. Thanks Goulet Ink!

Noodler's gives you a ton of ink in the bottle,overflowing, some glowing colors to work with and lots of interesting selections.

I use this ink in a yellow Lamy Safari with the broadest nib available for it, 1.9mm. I love how this ink seem to glow off the page.

Got a bottle of Firefly to put in my Platinum Preppy Highlighter, and is this stuff ever bright. It has good flow, and good coverage with only a minor amount of smudging on my FP inks.

This ink is at least as bright as other highlighter inks I've used and the added benefit of being flourescent is a nice touch!

As a student I go through highlighters like they're addictive and this has replaced all my other highlighters. It's a bright yellow that is competitive with the best commercial highlighters and per oz. it's an amazing bargain. I won't need to buy a new highlighter any time soon. A must have for students!

This is the exact color of my favorite type of yellow highlighters. I wanted a fade-resistant alternative to those markers, and Firefly fits the bill. The one thing you must be careful of - it will smudge washable fountain pen ink if you highlight over it. I got around that by using it to underline and circle. Used in combination with Dragon's Napalm (for writing in the margins), Firefly is a great ink!

Perfect (as previously). Shipped very quickly and packed brilliantly - especially as my daughter in law brought it to England for me in her suitcase. Will definitely be back for me in the future. Thank you.