13-watt T4 compact fluorescent bulb Review

When my desk ramp went out its bulb, I was going to shop at Home Depot for the replacement.
My Ramp is kind of one and its bulb was OSRAM DULUX S 13W/21
I couldn't find any of this model with same size up in internet.
Anyway, this product's name is Sylvania but actually it is same thing as DULUX S (It says on the box)
It works very well with my ramp and now I can keep studying more!!

Shipping also only took 2 days from New York to California in Christmas season. can you believe that?
Good purchase from good seller!

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Product Description:
13-watt T4 compact fluorescent twin tube bulb with bi-pin base, 4100K color temperature and color-rendering index of 82. Average rated life of 10000 hours. Line voltage. This product, or component of this product, contains mercury. Do not place in trash. Please recycle or dispose of in a certified hazardous waste facility. DL # 17158.

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