Hi,
If you are asking about Sony KP-57HW40 tv as model shown in your question headings then it is rear projection tv that has 3 Picture Tubes of red-green-blue colors to produce colorful picture on its screen.
This tv does not use Bulb/ Lamp as it this being utilized in dlp tv.
Let me know exact model number of your tv that would be written at back to provide you more info.
Thanks.
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