Review (5/5): Best with a LED or UV lamp
Some folks say you can get the effect without a lamp but I found that the LED light makes an enormous difference. I will add a picture for reference- but please keep in mind this was my 1st time ever using holo so it's not perfect yet. As you can see though, even a beginner like me figured out how to use it. Lot of fun!
Photo: nails on left have not been cured with lamp; pinkie nail has.