i just purchased an UltraFire WF-501B on line for around $11.00 and when i turned it on i was dissappointed with the light. It was yellowish and not very bright for one advertised as 900 cp. i got an e-mail from amazon today with the same light advertised as an led with a cree emmitter (?) and looking closely at the picture it has a flat yellowish "bulb" where the one i have has a clear bulb that sticks up about 1/8". did i get what i paid for? as you can tell i know little about lights and have just become aware of this board. thanks in advance for any information.