Finally a way to replace troublesome Allen MOS 1 & 2 card reader lamps. Include 11 special high output white LEDs, resistors and detailed instructions with color pictorials. Soldering experience a must or you can send board in for HLABs  to install the kit for a total price of $74.95 plus shipping. Note that the price may be higher if you have a defective photo transistor.
Send reader to: Harrison Labs Inc,
6480 E. Ponderosa Dr., Parker, CO 80138