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This is my second order of F13T5/CW bulbs from Linden Products. The manufacturer was listed as Circle but the first order's packaging said "sunlite" and the second order's was "DAMAR". I was very satisfied with the bulbs from the first order - they didn't last as long as the expensive brand name bulbs from the big box store but were satisfactory for their price point. However, the second order's DAMAR bulbs deserve zero stars if it was possible. The longest lasting bulb died after four hours. One lasted less than 10 minutes. I bought these bulbs in Nov of 2019 and unfortunately didn't start using them until a few months later, well past the 30 day return window. I'm hoping the vendor will read this review and do the right thing - either send replacements or provide a full refund. If the vendor makes contact, I'll update this review with the outcome.
this item is defective, bulb are no good, would like to return for refund. I have used all 6 bulbs, burn for short time and black area begins to form , then dim and stop burning. I want my money refunded. Still waiting for refund or any communications from Amazon. 12/29/2019