Don't have a Samsung. When the lamp went on my Toshiba, I looked and researched. I ended up ordering directly from Toshiba.
Be careful with the cheapie replacements as many will send you a bare bulb that will need to be clamped or even soldered into the existing housing. Others will send the bulb in cheap housings that will melt and warp. Then there is the Chinese sourced bulbs that seem to have a significantly lower life. I would really recommend buying something that is guaranteed to be genuine Samsung parts.