I experimented with those L. E. D. bulb replacements for the cab lights ,didn't care for them as for they were not as bright. I wish truck-lite or peterson would just take the whole lense and fill it full of L. E. D. 's to make it bright, the same should go for the rear taillights,(like some of the cadillacs have) third brakelight and the front turn signals. I know too ,that some of the amish carriage builder's have been getting white L. E. D. headlights also,which I would not mind having for back-up lights. I have alot of peterson brand L. E. D. that are used and possibly for sale. They're the lights that fit the dually fenders and the tailgate. I think I have 9 red and 9 yellow but will have to check to make sure... ... . anyone interested..... john