Are all of the colors reactive under black light? If not, which ones?

Only the orange and especially yellow are reactive and highly so. The others don't reflect at all. Pink shows vague promise but, like blue, simply disappears into its surroundings. Interestingly, the green really absorbs a lot of UV and looks dark/black under the light.

How long do they last? And does the color run through the other side of the page where it can be distracting?

My yellow got damaged the first week. It picked up black from paper (aka I was highlighting over my writing) and it ended up always leaving black smudges whenever I used it. The blue and green don't have these issues, and have lasted two semesters with a lot of writing, highlighting over said writing, and highlighting in books and handouts. Some paper everything will bleed though, some paper nothing will. These have less bleed through than color pens, but more than black pens. Still mad about that yellow.

ASIN	B000Q5ZGIA
Amazon Bestseller	#215,971 in Office Products ( See Top 100 in Office Products ) #928 in Liquid Highlighters
Batteries Included	No
Batteries Required	No
Brand Name	BIC
Color	Assorted Colors
Country of Origin	United States
Customer Reviews	4.8 4.8 out of 5 stars (36,526)
Date First Available	August 24, 2009
Item Weight	159 g
Manufacturer	Bic
Model Number	BLP51W-Ast
Package Dimensions	19.3 x 9.3 x 1.9 cm
Package Weight	0.05 Kilograms
Special Features	Non Toxic

BIC Brightliner Highlighter, Chisel Tip

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