Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: Not really a Blacklight Bulb

I bought this for the sole purpose of it being used as a black light. This however isn't a black light. It's more like a plain CFL with the glass tinted a purplish color. It doesn't make the UV light pop on whites for example- at all. I have another bulb that is a CFL true UV blacklight bulb- and it does as I expected, when doing a side by said comparison of the bulbs lit- it's obvious this isn't a blacklight at all.