I have 3 of these: https://www.altmanlighting.com/wp-content/uploads/2016/04/BlklightUV703_Datasheet.pdf All in good working condition. The HMI power packs tend to dislike dimmer power and have a 60-120 second warm up period. I have shuttered them with servos and black painted foam-core very well. However... you can wash a huge area with one instrument. It is REALLY good blacklight too. Almost no measurable visible light. Mine are a marginally earlier version with the Wood's glass seal-mounted in front of the fresnel lens. $100ea. plus packaging and shipping to your place. If you are in/near/passing through Ohio I am happy to meet you in Toledo/Cleveland/Detroit/Columbus areas. I will send detailed pictures/video on request. Send me a note if you have questions/answers.