To receive 20% off your lightbulb purchase at Lightingplus all you (the customer) need to do is present your old lightbulb in-store and trade it in.
This is an on-going promotion at Lightingplus and is currently only available in-store.
The only exceptions to the Trade-In Offer are Barry's Best Buy Twin Pack lamps - PLU's 73560, 73561, 73595, 73662 & 73663.
The 20% discount only applies to the light bulb(s) part of the transaction.