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Does the La Luz Optics light come with a red filter?
It is available. When you order from Ebay you usually get the light, a red filter, two batteries, a battery charger and a lanyard. I would specify that you want all of these parts when you bid. The red filter and the diffuser just slip onto the end of the light. They are quite easy to add and remove. The diffuser costs $10 but when bidding I would try and get them to throw it in. It is worth having as it really softens the edge of the beam.
I did not order from e-bay. Contact them directly - buy spare battery for USD 25, and you get red filter, diffuser and shipment for free. To summarize, for USD 224 you get 800 lumen focus light, 2 battery, 1 charger, difuser and red filter.