Question for you technical gurus. I'm replacing my burned out lite bulb (only lasted 3 years). The mfg recommended bulb 840211 from the pool stores is between $100 and $150. Interesting enough the P/N printed on the bulb (UHI-S150Dm/a/uvp) runs about $40 from online vendors. So my question is - has anyone else replaced their lite with the P/N instead of the mfg recommended part? Your comments are welcome.