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I've been using Ushio Opti Red HPS bulbs with Lumatek ballasts for over 5 years now. Started using the 400 & 600 watt bulbs in 2012 and haven't looked back. Great value and excellent light spectrum in red AND blue. These bulbs are engineered in Japan and manufactured in Germany. They are made well and are significantly cheaper than EYE bulbs. I've had only one bulb in all these years that didn't fire when I installed it. I returned it, received a replacement, and all was good. They are fantastic in dimmable ballasts and do well on hot restarts. As long as they are available, I'll keep buying and using them.
Verified purchase: No
I purchased 4 of these Ushio bulbs from 3 different sellers. All of them arrived DEAD.
Verified purchase: Yes | Condition: New
great product. nice light
Verified purchase: Yes | Condition: New
I noticed a difference after the first day, I will continue to use these bulbs from now on.
Verified purchase: Yes | Condition: New
Very bright, better than most. Second one I purchased.
Verified purchase: Yes | Condition: New
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