Replacing interior lights in a combo xl

You can get LED capsule bulbs that are much brighter. Funny thing is, all the other interior bulbs in my Vivaro Life are LED, except the two boot lights - not bothered to replace them yet, but did do on a previous car. Other option could be a battery operated LED strip light ? Just need to ensure the LED bulb isn't too big. I've replaced a number of 501 bulbs (eg number plate bulbs) with LED on other cars.  

12v led tape that’s used for under cupboard kitchen lighting stuck to the roof works well. If you take the van lamp holder to bits it should be fairly obvious where to connect it to so it works as the original lamp does

Halfords do a twin pack of 501 LED bulbs for £3.99 - they are very bright. 

https://www.halfords.com/motoring/bulbs/halfords-501-white-led-car-bulb-twin-pack-201491.html?istCompanyId=b8708c57-7a02-4cf6-b2c0-dc36b54a327e&istFeedId=367c5610-f937-4c81-8609-f84582324cd6&istItemId=mwixiittw&istBid=t&gclsrc=aw.ds&&_$ja=tsid:|cid:18030148076|agid:|tid:|crid:|nw:x|rnd:17572079612257002347|dvc:c|adp:|mt:|loc:9046436&gad_source=1&gad_campaignid=18022998873&gbraid=0AAAAADrJx6wtnkesofMcJODjS4UOzQUmv&gclid=Cj0KCQjwh5vFBhCyARIsAHBx2wyyAP-wGSR9ay3FSTJObrCJL4amjhQMgNNQKYlB2BH8N1RTDWFv6m8aAv6TEALw_wcB

I bought a pair of 200 lumen ones from Halfords, they've made a considerable difference! 5 more need the same as otherwise I'll have 3 bright and four shite